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3 | AnyEvent::HTTP - simple but non-blocking HTTP/HTTPS client |
3 | AnyEvent::HTTP - simple but non-blocking HTTP/HTTPS client |
4 | |
4 | |
5 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
6 | |
6 | |
7 | use AnyEvent::HTTP; |
7 | use AnyEvent::HTTP; |
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8 | |
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9 | http_get "http://www.nethype.de/", sub { print $_[1] }; |
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10 | |
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11 | # ... do something else here |
8 | |
12 | |
9 | =head1 DESCRIPTION |
13 | =head1 DESCRIPTION |
10 | |
14 | |
11 | This module is an L<AnyEvent> user, you need to make sure that you use and |
15 | This module is an L<AnyEvent> user, you need to make sure that you use and |
12 | run a supported event loop. |
16 | run a supported event loop. |
13 | |
17 | |
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18 | This module implements a simple, stateless and non-blocking HTTP |
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19 | client. It supports GET, POST and other request methods, cookies and more, |
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20 | all on a very low level. It can follow redirects, supports proxies, and |
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21 | automatically limits the number of connections to the values specified in |
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22 | the RFC. |
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23 | |
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24 | It should generally be a "good client" that is enough for most HTTP |
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25 | tasks. Simple tasks should be simple, but complex tasks should still be |
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26 | possible as the user retains control over request and response headers. |
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27 | |
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28 | The caller is responsible for authentication management, cookies (if |
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29 | the simplistic implementation in this module doesn't suffice), referer |
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30 | and other high-level protocol details for which this module offers only |
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31 | limited support. |
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32 | |
14 | =head2 METHODS |
33 | =head2 METHODS |
15 | |
34 | |
16 | =over 4 |
35 | =over 4 |
17 | |
36 | |
18 | =cut |
37 | =cut |
19 | |
38 | |
20 | package AnyEvent::HTTP; |
39 | package AnyEvent::HTTP; |
21 | |
40 | |
22 | use strict; |
41 | use common::sense; |
23 | no warnings; |
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24 | |
42 | |
25 | use Carp; |
43 | use Errno (); |
26 | |
44 | |
27 | use AnyEvent (); |
45 | use AnyEvent 5.0 (); |
28 | use AnyEvent::Util (); |
46 | use AnyEvent::Util (); |
29 | use AnyEvent::Socket (); |
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30 | use AnyEvent::Handle (); |
47 | use AnyEvent::Handle (); |
31 | |
48 | |
32 | use base Exporter::; |
49 | use base Exporter::; |
33 | |
50 | |
34 | our $VERSION = '1.0'; |
51 | our $VERSION = '2.1'; |
35 | |
52 | |
36 | our @EXPORT = qw(http_get http_request); |
53 | our @EXPORT = qw(http_get http_post http_head http_request); |
37 | |
54 | |
38 | our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; |
55 | our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; |
39 | our $MAX_RECURSE = 10; |
56 | our $MAX_RECURSE = 10; |
40 | our $MAX_PERSISTENT = 8; |
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41 | our $PERSISTENT_TIMEOUT = 2; |
57 | our $PERSISTENT_TIMEOUT = 3; |
42 | our $TIMEOUT = 300; |
58 | our $TIMEOUT = 300; |
43 | |
59 | our $MAX_PER_HOST = 4; # changing this is evil |
44 | # changing these is evil |
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45 | our $MAX_PERSISTENT_PER_HOST = 2; |
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46 | our $MAX_PER_HOST = 4; # not respected yet :( |
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47 | |
60 | |
48 | our $PROXY; |
61 | our $PROXY; |
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62 | our $ACTIVE = 0; |
49 | |
63 | |
50 | my %KA_COUNT; # number of open keep-alive connections per host |
64 | my %KA_CACHE; # indexed by uhost currently, points to [$handle...] array |
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65 | my %CO_SLOT; # number of open connections, and wait queue, per host |
51 | |
66 | |
52 | =item http_get $url, key => value..., $cb->($data, $headers) |
67 | =item http_get $url, key => value..., $cb->($data, $headers) |
53 | |
68 | |
54 | Executes an HTTP-GET request. See the http_request function for details on |
69 | Executes an HTTP-GET request. See the http_request function for details on |
55 | additional parameters. |
70 | additional parameters and the return value. |
56 | |
71 | |
57 | =item http_head $url, key => value..., $cb->($data, $headers) |
72 | =item http_head $url, key => value..., $cb->($data, $headers) |
58 | |
73 | |
59 | Executes an HTTP-HEAD request. See the http_request function for details on |
74 | Executes an HTTP-HEAD request. See the http_request function for details |
60 | additional parameters. |
75 | on additional parameters and the return value. |
61 | |
76 | |
62 | =item http_post $url, $body, key => value..., $cb->($data, $headers) |
77 | =item http_post $url, $body, key => value..., $cb->($data, $headers) |
63 | |
78 | |
64 | Executes an HTTP-POST request with a request body of C<$bod>. See the |
79 | Executes an HTTP-POST request with a request body of C<$body>. See the |
65 | http_request function for details on additional parameters. |
80 | http_request function for details on additional parameters and the return |
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81 | value. |
66 | |
82 | |
67 | =item http_request $method => $url, key => value..., $cb->($data, $headers) |
83 | =item http_request $method => $url, key => value..., $cb->($data, $headers) |
68 | |
84 | |
69 | Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL |
85 | Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL |
70 | must be an absolute http or https URL. |
86 | must be an absolute http or https URL. |
71 | |
87 | |
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88 | When called in void context, nothing is returned. In other contexts, |
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89 | C<http_request> returns a "cancellation guard" - you have to keep the |
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90 | object at least alive until the callback get called. If the object gets |
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91 | destroyed before the callback is called, the request will be cancelled. |
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92 | |
72 | The callback will be called with the response data as first argument |
93 | The callback will be called with the response body data as first argument |
73 | (or C<undef> if it wasn't available due to errors), and a hash-ref with |
94 | (or C<undef> if an error occured), and a hash-ref with response headers |
74 | response headers as second argument. |
95 | (and trailers) as second argument. |
75 | |
96 | |
76 | All the headers in that hash are lowercased. In addition to the response |
97 | All the headers in that hash are lowercased. In addition to the response |
77 | headers, the three "pseudo-headers" C<HTTPVersion>, C<Status> and |
98 | headers, the "pseudo-headers" (uppercase to avoid clashing with possible |
78 | C<Reason> contain the three parts of the HTTP Status-Line of the same |
99 | response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the |
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100 | three parts of the HTTP Status-Line of the same name. If an error occurs |
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101 | during the body phase of a request, then the original C<Status> and |
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102 | C<Reason> values from the header are available as C<OrigStatus> and |
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103 | C<OrigReason>. |
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104 | |
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105 | The pseudo-header C<URL> contains the actual URL (which can differ from |
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106 | the requested URL when following redirects - for example, you might get |
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107 | an error that your URL scheme is not supported even though your URL is a |
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108 | valid http URL because it redirected to an ftp URL, in which case you can |
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109 | look at the URL pseudo header). |
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110 | |
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111 | The pseudo-header C<Redirect> only exists when the request was a result |
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112 | of an internal redirect. In that case it is an array reference with |
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113 | the C<($data, $headers)> from the redirect response. Note that this |
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114 | response could in turn be the result of a redirect itself, and C<< |
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115 | $headers->{Redirect}[1]{Redirect} >> will then contain the original |
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116 | response, and so on. |
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117 | |
79 | name. If the server sends a header multiple lines, then their contents |
118 | If the server sends a header multiple times, then their contents will be |
80 | will be joined together with C<\x00>. |
119 | joined together with a comma (C<,>), as per the HTTP spec. |
81 | |
120 | |
82 | If an internal error occurs, such as not being able to resolve a hostname, |
121 | If an internal error occurs, such as not being able to resolve a hostname, |
83 | then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599> |
122 | then C<$data> will be C<undef>, C<< $headers->{Status} >> will be |
84 | and the C<Reason> pseudo-header will contain an error message. |
123 | C<590>-C<599> and the C<Reason> pseudo-header will contain an error |
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124 | message. Currently the following status codes are used: |
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125 | |
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126 | =over 4 |
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127 | |
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128 | =item 595 - errors during connection etsbalishment, proxy handshake. |
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129 | |
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130 | =item 596 - errors during TLS negotiation, request sending and header processing. |
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131 | |
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132 | =item 597 - errors during body receiving or processing. |
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133 | |
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134 | =item 598 - user aborted request via C<on_header> or C<on_body>. |
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135 | |
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136 | =item 599 - other, usually nonretryable, errors (garbled URL etc.). |
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137 | |
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138 | =back |
85 | |
139 | |
86 | A typical callback might look like this: |
140 | A typical callback might look like this: |
87 | |
141 | |
88 | sub { |
142 | sub { |
89 | my ($body, $hdr) = @_; |
143 | my ($body, $hdr) = @_; |
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105 | Whether to recurse requests or not, e.g. on redirects, authentication |
159 | Whether to recurse requests or not, e.g. on redirects, authentication |
106 | retries and so on, and how often to do so. |
160 | retries and so on, and how often to do so. |
107 | |
161 | |
108 | =item headers => hashref |
162 | =item headers => hashref |
109 | |
163 | |
110 | The request headers to use. |
164 | The request headers to use. Currently, C<http_request> may provide its own |
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165 | C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and |
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166 | will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:> |
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167 | (this can be suppressed by using C<undef> for these headers in which case |
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168 | they won't be sent at all). |
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169 | |
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170 | You really should provide your own C<User-Agent:> header value that is |
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171 | appropriate for your program - I wouldn't be surprised if the default |
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172 | AnyEvent string gets blocked by webservers sooner or later. |
111 | |
173 | |
112 | =item timeout => $seconds |
174 | =item timeout => $seconds |
113 | |
175 | |
114 | The time-out to use for various stages - each connect attempt will reset |
176 | The time-out to use for various stages - each connect attempt will reset |
115 | the timeout, as will read or write activity. Default timeout is 5 minutes. |
177 | the timeout, as will read or write activity, i.e. this is not an overall |
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178 | timeout. |
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179 | |
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180 | Default timeout is 5 minutes. |
116 | |
181 | |
117 | =item proxy => [$host, $port[, $scheme]] or undef |
182 | =item proxy => [$host, $port[, $scheme]] or undef |
118 | |
183 | |
119 | Use the given http proxy for all requests. If not specified, then the |
184 | Use the given http proxy for all requests, or no proxy if C<undef> is |
120 | default proxy (as specified by C<$ENV{http_proxy}>) is used. |
185 | used. |
121 | |
186 | |
122 | C<$scheme> must be either missing or C<http> for HTTP, or C<https> for |
187 | C<$scheme> must be either missing or must be C<http> for HTTP. |
123 | HTTPS. |
188 | |
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189 | If not specified, then the default proxy is used (see |
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190 | C<AnyEvent::HTTP::set_proxy>). |
124 | |
191 | |
125 | =item body => $string |
192 | =item body => $string |
126 | |
193 | |
127 | The request body, usually empty. Will be-sent as-is (future versions of |
194 | The request body, usually empty. Will be sent as-is (future versions of |
128 | this module might offer more options). |
195 | this module might offer more options). |
129 | |
196 | |
130 | =item cookie_jar => $hash_ref |
197 | =item cookie_jar => $hash_ref |
131 | |
198 | |
132 | Passing this parameter enables (simplified) cookie-processing, loosely |
199 | Passing this parameter enables (simplified) cookie-processing, loosely |
133 | based on the original netscape specification. |
200 | based on the original netscape specification. |
134 | |
201 | |
135 | The C<$hash_ref> must be an (initially empty) hash reference which will |
202 | The C<$hash_ref> must be an (initially empty) hash reference which |
136 | get updated automatically. It is possible to save the cookie_jar to |
203 | will get updated automatically. It is possible to save the cookie jar |
137 | persistent storage with something like JSON or Storable, but this is not |
204 | to persistent storage with something like JSON or Storable - see the |
138 | recommended, as expire times are currently being ignored. |
205 | C<AnyEvent::HTTP::cookie_jar_expire> function if you wish to remove |
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206 | expired or session-only cookies, and also for documentation on the format |
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207 | of the cookie jar. |
139 | |
208 | |
140 | Note that this cookie implementation is not of very high quality, nor |
209 | Note that this cookie implementation is not meant to be complete. If |
141 | meant to be complete. If you want complete cookie management you have to |
210 | you want complete cookie management you have to do that on your |
142 | do that on your own. C<cookie_jar> is meant as a quick fix to get some |
211 | own. C<cookie_jar> is meant as a quick fix to get most cookie-using sites |
143 | cookie-using sites working. Cookies are a privacy disaster, do not use |
212 | working. Cookies are a privacy disaster, do not use them unless required |
144 | them unless required to. |
213 | to. |
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214 | |
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215 | When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:> |
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216 | headers will be set and handled by this module, otherwise they will be |
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217 | left untouched. |
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218 | |
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219 | =item tls_ctx => $scheme | $tls_ctx |
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220 | |
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221 | Specifies the AnyEvent::TLS context to be used for https connections. This |
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222 | parameter follows the same rules as the C<tls_ctx> parameter to |
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223 | L<AnyEvent::Handle>, but additionally, the two strings C<low> or |
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224 | C<high> can be specified, which give you a predefined low-security (no |
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225 | verification, highest compatibility) and high-security (CA and common-name |
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226 | verification) TLS context. |
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227 | |
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228 | The default for this option is C<low>, which could be interpreted as "give |
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229 | me the page, no matter what". |
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230 | |
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231 | See also the C<sessionid> parameter. |
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232 | |
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233 | =item session => $string |
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234 | |
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235 | The module might reuse connections to the same host internally. Sometimes |
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236 | (e.g. when using TLS), you do not want to reuse connections from other |
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237 | sessions. This can be achieved by setting this parameter to some unique |
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238 | ID (such as the address of an object storing your state data, or the TLS |
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239 | context) - only connections using the same unique ID will be reused. |
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240 | |
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241 | =item on_prepare => $callback->($fh) |
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242 | |
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243 | In rare cases you need to "tune" the socket before it is used to |
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244 | connect (for exmaple, to bind it on a given IP address). This parameter |
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245 | overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect> |
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246 | and behaves exactly the same way (e.g. it has to provide a |
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247 | timeout). See the description for the C<$prepare_cb> argument of |
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248 | C<AnyEvent::Socket::tcp_connect> for details. |
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249 | |
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250 | =item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb) |
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251 | |
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252 | In even rarer cases you want total control over how AnyEvent::HTTP |
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253 | establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect> |
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254 | to do this, but you can provide your own C<tcp_connect> function - |
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255 | obviously, it has to follow the same calling conventions, except that it |
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256 | may always return a connection guard object. |
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257 | |
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258 | There are probably lots of weird uses for this function, starting from |
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259 | tracing the hosts C<http_request> actually tries to connect, to (inexact |
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260 | but fast) host => IP address caching or even socks protocol support. |
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261 | |
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262 | =item on_header => $callback->($headers) |
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263 | |
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264 | When specified, this callback will be called with the header hash as soon |
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265 | as headers have been successfully received from the remote server (not on |
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266 | locally-generated errors). |
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267 | |
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268 | It has to return either true (in which case AnyEvent::HTTP will continue), |
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269 | or false, in which case AnyEvent::HTTP will cancel the download (and call |
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270 | the finish callback with an error code of C<598>). |
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271 | |
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272 | This callback is useful, among other things, to quickly reject unwanted |
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273 | content, which, if it is supposed to be rare, can be faster than first |
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274 | doing a C<HEAD> request. |
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275 | |
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276 | The downside is that cancelling the request makes it impossible to re-use |
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277 | the connection. Also, the C<on_header> callback will not receive any |
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278 | trailer (headers sent after the response body). |
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279 | |
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280 | Example: cancel the request unless the content-type is "text/html". |
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281 | |
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282 | on_header => sub { |
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283 | $_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/ |
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284 | }, |
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285 | |
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286 | =item on_body => $callback->($partial_body, $headers) |
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287 | |
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288 | When specified, all body data will be passed to this callback instead of |
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289 | to the completion callback. The completion callback will get the empty |
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290 | string instead of the body data. |
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291 | |
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292 | It has to return either true (in which case AnyEvent::HTTP will continue), |
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293 | or false, in which case AnyEvent::HTTP will cancel the download (and call |
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294 | the completion callback with an error code of C<598>). |
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295 | |
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296 | The downside to cancelling the request is that it makes it impossible to |
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297 | re-use the connection. |
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298 | |
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299 | This callback is useful when the data is too large to be held in memory |
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300 | (so the callback writes it to a file) or when only some information should |
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301 | be extracted, or when the body should be processed incrementally. |
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302 | |
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303 | It is usually preferred over doing your own body handling via |
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304 | C<want_body_handle>, but in case of streaming APIs, where HTTP is |
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305 | only used to create a connection, C<want_body_handle> is the better |
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306 | alternative, as it allows you to install your own event handler, reducing |
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307 | resource usage. |
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308 | |
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309 | =item want_body_handle => $enable |
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310 | |
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311 | When enabled (default is disabled), the behaviour of AnyEvent::HTTP |
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312 | changes considerably: after parsing the headers, and instead of |
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313 | downloading the body (if any), the completion callback will be |
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314 | called. Instead of the C<$body> argument containing the body data, the |
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315 | callback will receive the L<AnyEvent::Handle> object associated with the |
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316 | connection. In error cases, C<undef> will be passed. When there is no body |
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317 | (e.g. status C<304>), the empty string will be passed. |
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318 | |
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319 | The handle object might or might not be in TLS mode, might be connected |
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320 | to a proxy, be a persistent connection, use chunked transfer encoding |
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321 | etc., and configured in unspecified ways. The user is responsible for this |
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322 | handle (it will not be used by this module anymore). |
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323 | |
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324 | This is useful with some push-type services, where, after the initial |
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325 | headers, an interactive protocol is used (typical example would be the |
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326 | push-style twitter API which starts a JSON/XML stream). |
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327 | |
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328 | If you think you need this, first have a look at C<on_body>, to see if |
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329 | that doesn't solve your problem in a better way. |
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330 | |
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331 | =item persistent => $boolean |
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332 | |
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333 | Try to create/reuse a persistent connection. When this flag is set |
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334 | (default: true for idempotent requests, false for all others), then |
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335 | C<http_request> tries to re-use an existing (previously-created) |
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336 | persistent connection to the host and, failing that, tries to create a new |
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337 | one. |
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338 | |
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339 | Requests failing in certain ways will be automatically retried once, which |
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340 | is dangerous for non-idempotent requests, which is why it defaults to off |
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341 | for them. The reason for this is because the bozos who designed HTTP/1.1 |
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342 | made it impossible to distinguish between a fatal error and a normal |
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343 | connection timeout, so you never know whether there was a problem with |
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344 | your request or not. |
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345 | |
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346 | When reusing an existent connection, many parameters (such as TLS context) |
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347 | will be ignored. See the C<session> parameter for a workaround. |
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348 | |
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349 | =item keepalive => $boolean |
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350 | |
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351 | Only used when C<persistent> is also true. This parameter decides whether |
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352 | C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection |
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353 | (as opposed to only a HTTP/1.1 persistent connection). |
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354 | |
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355 | The default is true, except when using a proxy, in which case it defaults |
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356 | to false, as HTTP/1.0 proxies cannot support this in a meaningful way. |
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357 | |
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358 | =item handle_params => { key => value ... } |
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359 | |
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360 | The key-value pairs in this hash will be passed to any L<AnyEvent::Handle> |
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361 | constructor that is called - not all requests will create a handle, and |
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362 | sometimes more than one is created, so this parameter is only good for |
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363 | setting hints. |
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364 | |
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365 | Example: set the maximum read size to 4096, to potentially conserve memory |
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366 | at the cost of speed. |
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367 | |
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368 | handle_params => { |
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369 | max_read_size => 4096, |
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370 | }, |
145 | |
371 | |
146 | =back |
372 | =back |
147 | |
373 | |
148 | Example: make a simple HTTP GET request for http://www.nethype.de/ |
374 | Example: do a simple HTTP GET request for http://www.nethype.de/ and print |
|
|
375 | the response body. |
149 | |
376 | |
150 | http_request GET => "http://www.nethype.de/", sub { |
377 | http_request GET => "http://www.nethype.de/", sub { |
151 | my ($body, $hdr) = @_; |
378 | my ($body, $hdr) = @_; |
152 | print "$body\n"; |
379 | print "$body\n"; |
153 | }; |
380 | }; |
154 | |
381 | |
155 | Example: make a HTTP HEAD request on https://www.google.com/, use a |
382 | Example: do a HTTP HEAD request on https://www.google.com/, use a |
156 | timeout of 30 seconds. |
383 | timeout of 30 seconds. |
157 | |
384 | |
158 | http_request |
385 | http_request |
159 | GET => "https://www.google.com", |
386 | GET => "https://www.google.com", |
|
|
387 | headers => { "user-agent" => "MySearchClient 1.0" }, |
160 | timeout => 30, |
388 | timeout => 30, |
161 | sub { |
389 | sub { |
162 | my ($body, $hdr) = @_; |
390 | my ($body, $hdr) = @_; |
163 | use Data::Dumper; |
391 | use Data::Dumper; |
164 | print Dumper $hdr; |
392 | print Dumper $hdr; |
165 | } |
393 | } |
166 | ; |
394 | ; |
167 | |
395 | |
|
|
396 | Example: do another simple HTTP GET request, but immediately try to |
|
|
397 | cancel it. |
|
|
398 | |
|
|
399 | my $request = http_request GET => "http://www.nethype.de/", sub { |
|
|
400 | my ($body, $hdr) = @_; |
|
|
401 | print "$body\n"; |
|
|
402 | }; |
|
|
403 | |
|
|
404 | undef $request; |
|
|
405 | |
168 | =cut |
406 | =cut |
169 | |
407 | |
|
|
408 | ############################################################################# |
|
|
409 | # wait queue/slots |
|
|
410 | |
|
|
411 | sub _slot_schedule; |
|
|
412 | sub _slot_schedule($) { |
|
|
413 | my $host = shift; |
|
|
414 | |
|
|
415 | while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) { |
|
|
416 | if (my $cb = shift @{ $CO_SLOT{$host}[1] }) { |
|
|
417 | # somebody wants that slot |
|
|
418 | ++$CO_SLOT{$host}[0]; |
|
|
419 | ++$ACTIVE; |
|
|
420 | |
|
|
421 | $cb->(AnyEvent::Util::guard { |
|
|
422 | --$ACTIVE; |
|
|
423 | --$CO_SLOT{$host}[0]; |
|
|
424 | _slot_schedule $host; |
|
|
425 | }); |
|
|
426 | } else { |
|
|
427 | # nobody wants the slot, maybe we can forget about it |
|
|
428 | delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0]; |
|
|
429 | last; |
|
|
430 | } |
|
|
431 | } |
|
|
432 | } |
|
|
433 | |
|
|
434 | # wait for a free slot on host, call callback |
|
|
435 | sub _get_slot($$) { |
|
|
436 | push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; |
|
|
437 | |
|
|
438 | _slot_schedule $_[0]; |
|
|
439 | } |
|
|
440 | |
|
|
441 | ############################################################################# |
|
|
442 | # cookie handling |
|
|
443 | |
|
|
444 | # expire cookies |
|
|
445 | sub cookie_jar_expire($;$) { |
|
|
446 | my ($jar, $session_end) = @_; |
|
|
447 | |
|
|
448 | %$jar = () if $jar->{version} != 1; |
|
|
449 | |
|
|
450 | my $anow = AE::now; |
|
|
451 | |
|
|
452 | while (my ($chost, $paths) = each %$jar) { |
|
|
453 | next unless ref $paths; |
|
|
454 | |
|
|
455 | while (my ($cpath, $cookies) = each %$paths) { |
|
|
456 | while (my ($cookie, $kv) = each %$cookies) { |
|
|
457 | if (exists $kv->{_expires}) { |
|
|
458 | delete $cookies->{$cookie} |
|
|
459 | if $anow > $kv->{_expires}; |
|
|
460 | } elsif ($session_end) { |
|
|
461 | delete $cookies->{$cookie}; |
|
|
462 | } |
|
|
463 | } |
|
|
464 | |
|
|
465 | delete $paths->{$cpath} |
|
|
466 | unless %$cookies; |
|
|
467 | } |
|
|
468 | |
|
|
469 | delete $jar->{$chost} |
|
|
470 | unless %$paths; |
|
|
471 | } |
|
|
472 | } |
|
|
473 | |
|
|
474 | # extract cookies from jar |
|
|
475 | sub cookie_jar_extract($$$$) { |
|
|
476 | my ($jar, $scheme, $host, $path) = @_; |
|
|
477 | |
|
|
478 | %$jar = () if $jar->{version} != 1; |
|
|
479 | |
|
|
480 | my @cookies; |
|
|
481 | |
|
|
482 | while (my ($chost, $paths) = each %$jar) { |
|
|
483 | next unless ref $paths; |
|
|
484 | |
|
|
485 | if ($chost =~ /^\./) { |
|
|
486 | next unless $chost eq substr $host, -length $chost; |
|
|
487 | } elsif ($chost =~ /\./) { |
|
|
488 | next unless $chost eq $host; |
|
|
489 | } else { |
|
|
490 | next; |
|
|
491 | } |
|
|
492 | |
|
|
493 | while (my ($cpath, $cookies) = each %$paths) { |
|
|
494 | next unless $cpath eq substr $path, 0, length $cpath; |
|
|
495 | |
|
|
496 | while (my ($cookie, $kv) = each %$cookies) { |
|
|
497 | next if $scheme ne "https" && exists $kv->{secure}; |
|
|
498 | |
|
|
499 | if (exists $kv->{_expires} and AE::now > $kv->{_expires}) { |
|
|
500 | delete $cookies->{$cookie}; |
|
|
501 | next; |
|
|
502 | } |
|
|
503 | |
|
|
504 | my $value = $kv->{value}; |
|
|
505 | |
|
|
506 | if ($value =~ /[=;,[:space:]]/) { |
|
|
507 | $value =~ s/([\\"])/\\$1/g; |
|
|
508 | $value = "\"$value\""; |
|
|
509 | } |
|
|
510 | |
|
|
511 | push @cookies, "$cookie=$value"; |
|
|
512 | } |
|
|
513 | } |
|
|
514 | } |
|
|
515 | |
|
|
516 | \@cookies |
|
|
517 | } |
|
|
518 | |
|
|
519 | # parse set_cookie header into jar |
|
|
520 | sub cookie_jar_set_cookie($$$$) { |
|
|
521 | my ($jar, $set_cookie, $host, $date) = @_; |
|
|
522 | |
|
|
523 | my $anow = int AE::now; |
|
|
524 | my $snow; # server-now |
|
|
525 | |
|
|
526 | for ($set_cookie) { |
|
|
527 | # parse NAME=VALUE |
|
|
528 | my @kv; |
|
|
529 | |
|
|
530 | # expires is not http-compliant in the original cookie-spec, |
|
|
531 | # we support the official date format and some extensions |
|
|
532 | while ( |
|
|
533 | m{ |
|
|
534 | \G\s* |
|
|
535 | (?: |
|
|
536 | expires \s*=\s* ([A-Z][a-z][a-z]+,\ [^,;]+) |
|
|
537 | | ([^=;,[:space:]]+) (?: \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^;,[:space:]]*) ) )? |
|
|
538 | ) |
|
|
539 | }gcxsi |
|
|
540 | ) { |
|
|
541 | my $name = $2; |
|
|
542 | my $value = $4; |
|
|
543 | |
|
|
544 | if (defined $1) { |
|
|
545 | # expires |
|
|
546 | $name = "expires"; |
|
|
547 | $value = $1; |
|
|
548 | } elsif (defined $3) { |
|
|
549 | # quoted |
|
|
550 | $value = $3; |
|
|
551 | $value =~ s/\\(.)/$1/gs; |
|
|
552 | } |
|
|
553 | |
|
|
554 | push @kv, @kv ? lc $name : $name, $value; |
|
|
555 | |
|
|
556 | last unless /\G\s*;/gc; |
|
|
557 | } |
|
|
558 | |
|
|
559 | last unless @kv; |
|
|
560 | |
|
|
561 | my $name = shift @kv; |
|
|
562 | my %kv = (value => shift @kv, @kv); |
|
|
563 | |
|
|
564 | if (exists $kv{"max-age"}) { |
|
|
565 | $kv{_expires} = $anow + delete $kv{"max-age"}; |
|
|
566 | } elsif (exists $kv{expires}) { |
|
|
567 | $snow ||= parse_date ($date) || $anow; |
|
|
568 | $kv{_expires} = $anow + (parse_date (delete $kv{expires}) - $snow); |
|
|
569 | } else { |
|
|
570 | delete $kv{_expires}; |
|
|
571 | } |
|
|
572 | |
|
|
573 | my $cdom; |
|
|
574 | my $cpath = (delete $kv{path}) || "/"; |
|
|
575 | |
|
|
576 | if (exists $kv{domain}) { |
|
|
577 | $cdom = delete $kv{domain}; |
|
|
578 | |
|
|
579 | $cdom =~ s/^\.?/./; # make sure it starts with a "." |
|
|
580 | |
|
|
581 | next if $cdom =~ /\.$/; |
|
|
582 | |
|
|
583 | # this is not rfc-like and not netscape-like. go figure. |
|
|
584 | my $ndots = $cdom =~ y/.//; |
|
|
585 | next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2); |
|
|
586 | } else { |
|
|
587 | $cdom = $host; |
|
|
588 | } |
|
|
589 | |
|
|
590 | # store it |
|
|
591 | $jar->{version} = 1; |
|
|
592 | $jar->{lc $cdom}{$cpath}{$name} = \%kv; |
|
|
593 | |
|
|
594 | redo if /\G\s*,/gc; |
|
|
595 | } |
|
|
596 | } |
|
|
597 | |
|
|
598 | ############################################################################# |
|
|
599 | # keepalive/persistent connection cache |
|
|
600 | |
|
|
601 | # fetch a connection from the keepalive cache |
|
|
602 | sub ka_fetch($) { |
|
|
603 | my $ka_key = shift; |
|
|
604 | |
|
|
605 | my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection |
|
|
606 | delete $KA_CACHE{$ka_key} |
|
|
607 | unless @{ $KA_CACHE{$ka_key} }; |
|
|
608 | |
|
|
609 | $hdl |
|
|
610 | } |
|
|
611 | |
|
|
612 | sub ka_store($$) { |
|
|
613 | my ($ka_key, $hdl) = @_; |
|
|
614 | |
|
|
615 | my $kaa = $KA_CACHE{$ka_key} ||= []; |
|
|
616 | |
|
|
617 | my $destroy = sub { |
|
|
618 | my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} }; |
|
|
619 | |
|
|
620 | $hdl->destroy; |
|
|
621 | |
|
|
622 | @ka |
|
|
623 | ? $KA_CACHE{$ka_key} = \@ka |
|
|
624 | : delete $KA_CACHE{$ka_key}; |
|
|
625 | }; |
|
|
626 | |
|
|
627 | # on error etc., destroy |
|
|
628 | $hdl->on_error ($destroy); |
|
|
629 | $hdl->on_eof ($destroy); |
|
|
630 | $hdl->on_read ($destroy); |
|
|
631 | $hdl->timeout ($PERSISTENT_TIMEOUT); |
|
|
632 | |
|
|
633 | push @$kaa, $hdl; |
|
|
634 | shift @$kaa while @$kaa > $MAX_PER_HOST; |
|
|
635 | } |
|
|
636 | |
|
|
637 | ############################################################################# |
|
|
638 | # utilities |
|
|
639 | |
|
|
640 | # continue to parse $_ for headers and place them into the arg |
|
|
641 | sub _parse_hdr() { |
|
|
642 | my %hdr; |
|
|
643 | |
|
|
644 | # things seen, not parsed: |
|
|
645 | # p3pP="NON CUR OTPi OUR NOR UNI" |
|
|
646 | |
|
|
647 | $hdr{lc $1} .= ",$2" |
|
|
648 | while /\G |
|
|
649 | ([^:\000-\037]*): |
|
|
650 | [\011\040]* |
|
|
651 | ((?: [^\012]+ | \012[\011\040] )*) |
|
|
652 | \012 |
|
|
653 | /gxc; |
|
|
654 | |
|
|
655 | /\G$/ |
|
|
656 | or return; |
|
|
657 | |
|
|
658 | # remove the "," prefix we added to all headers above |
|
|
659 | substr $_, 0, 1, "" |
|
|
660 | for values %hdr; |
|
|
661 | |
|
|
662 | \%hdr |
|
|
663 | } |
|
|
664 | |
|
|
665 | ############################################################################# |
|
|
666 | # http_get |
|
|
667 | |
|
|
668 | our $qr_nlnl = qr{(?<![^\012])\015?\012}; |
|
|
669 | |
|
|
670 | our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; |
|
|
671 | our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; |
|
|
672 | |
|
|
673 | # maybe it should just become a normal object :/ |
|
|
674 | |
|
|
675 | sub _destroy_state(\%) { |
|
|
676 | my ($state) = @_; |
|
|
677 | |
|
|
678 | $state->{handle}->destroy if $state->{handle}; |
|
|
679 | %$state = (); |
|
|
680 | } |
|
|
681 | |
|
|
682 | sub _error(\%$$) { |
|
|
683 | my ($state, $cb, $hdr) = @_; |
|
|
684 | |
|
|
685 | &_destroy_state ($state); |
|
|
686 | |
|
|
687 | $cb->(undef, $hdr); |
|
|
688 | () |
|
|
689 | } |
|
|
690 | |
170 | sub http_request($$$;@) { |
691 | sub http_request($$@) { |
171 | my $cb = pop; |
692 | my $cb = pop; |
172 | my ($method, $url, %arg) = @_; |
693 | my ($method, $url, %arg) = @_; |
173 | |
694 | |
174 | my %hdr; |
695 | my %hdr; |
|
|
696 | |
|
|
697 | $arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" || !exists $arg{tls_ctx}; |
|
|
698 | $arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high"; |
175 | |
699 | |
176 | $method = uc $method; |
700 | $method = uc $method; |
177 | |
701 | |
178 | if (my $hdr = $arg{headers}) { |
702 | if (my $hdr = $arg{headers}) { |
179 | while (my ($k, $v) = each %$hdr) { |
703 | while (my ($k, $v) = each %$hdr) { |
180 | $hdr{lc $k} = $v; |
704 | $hdr{lc $k} = $v; |
181 | } |
705 | } |
182 | } |
706 | } |
183 | |
707 | |
|
|
708 | # pseudo headers for all subsequent responses |
|
|
709 | my @pseudo = (URL => $url); |
|
|
710 | push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect}; |
|
|
711 | |
184 | my $recurse = exists $arg{recurse} ? $arg{recurse} : $MAX_RECURSE; |
712 | my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; |
185 | |
713 | |
186 | return $cb->(undef, { Status => 599, Reason => "recursion limit reached" }) |
714 | return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" }) |
187 | if $recurse < 0; |
715 | if $recurse < 0; |
188 | |
716 | |
189 | my $proxy = $arg{proxy} || $PROXY; |
717 | my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY; |
190 | my $timeout = $arg{timeout} || $TIMEOUT; |
718 | my $timeout = $arg{timeout} || $TIMEOUT; |
191 | |
719 | |
192 | $hdr{"user-agent"} ||= $USERAGENT; |
|
|
193 | |
|
|
194 | my ($scheme, $authority, $upath, $query, $fragment) = |
720 | my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment |
195 | $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; |
721 | $url =~ m|^([^:]+):(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?$|; |
196 | |
722 | |
197 | $scheme = lc $scheme; |
723 | $uscheme = lc $uscheme; |
198 | |
724 | |
199 | my $uport = $scheme eq "http" ? 80 |
725 | my $uport = $uscheme eq "http" ? 80 |
200 | : $scheme eq "https" ? 443 |
726 | : $uscheme eq "https" ? 443 |
201 | : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported" }); |
727 | : return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" }); |
202 | |
728 | |
203 | $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x |
729 | $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x |
204 | or return $cb->(undef, { Status => 599, Reason => "unparsable URL" }); |
730 | or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" }); |
205 | |
731 | |
206 | my $uhost = $1; |
732 | my $uhost = lc $1; |
207 | $uport = $2 if defined $2; |
733 | $uport = $2 if defined $2; |
208 | |
734 | |
|
|
735 | $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost" |
|
|
736 | unless exists $hdr{host}; |
|
|
737 | |
209 | $uhost =~ s/^\[(.*)\]$/$1/; |
738 | $uhost =~ s/^\[(.*)\]$/$1/; |
210 | $upath .= "?$query" if length $query; |
739 | $upath .= $query if length $query; |
211 | |
740 | |
212 | $upath =~ s%^/?%/%; |
741 | $upath =~ s%^/?%/%; |
213 | |
742 | |
214 | # cookie processing |
743 | # cookie processing |
215 | if (my $jar = $arg{cookie_jar}) { |
744 | if (my $jar = $arg{cookie_jar}) { |
216 | %$jar = () if $jar->{version} < 1; |
745 | my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath; |
217 | |
746 | |
218 | my @cookie; |
|
|
219 | |
|
|
220 | while (my ($chost, $v) = each %$jar) { |
|
|
221 | next unless $chost eq substr $uhost, -length $chost; |
|
|
222 | next unless $chost =~ /^\./; |
|
|
223 | |
|
|
224 | while (my ($cpath, $v) = each %$v) { |
|
|
225 | next unless $cpath eq substr $upath, 0, length $cpath; |
|
|
226 | |
|
|
227 | while (my ($k, $v) = each %$v) { |
|
|
228 | next if $scheme ne "https" && exists $v->{secure}; |
|
|
229 | push @cookie, "$k=$v->{value}"; |
|
|
230 | } |
|
|
231 | } |
|
|
232 | } |
|
|
233 | |
|
|
234 | $hdr{cookie} = join "; ", @cookie |
747 | $hdr{cookie} = join "; ", @$cookies |
235 | if @cookie; |
748 | if @$cookies; |
236 | } |
749 | } |
237 | |
750 | |
238 | my ($rhost, $rport, $rpath); # request host, port, path |
751 | my ($rhost, $rport, $rscheme, $rpath); # request host, port, path |
239 | |
752 | |
240 | if ($proxy) { |
753 | if ($proxy) { |
241 | ($rhost, $rport, $scheme) = @$proxy; |
754 | ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy); |
242 | $rpath = $url; |
755 | |
|
|
756 | $rscheme = "http" unless defined $rscheme; |
|
|
757 | |
|
|
758 | # don't support https requests over https-proxy transport, |
|
|
759 | # can't be done with tls as spec'ed, unless you double-encrypt. |
|
|
760 | $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; |
|
|
761 | |
|
|
762 | $rhost = lc $rhost; |
|
|
763 | $rscheme = lc $rscheme; |
243 | } else { |
764 | } else { |
244 | ($rhost, $rport, $rpath) = ($uhost, $uport, $upath); |
765 | ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); |
245 | $hdr{host} = $uhost; |
|
|
246 | } |
766 | } |
247 | |
767 | |
|
|
768 | # leave out fragment and query string, just a heuristic |
|
|
769 | $hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer}; |
|
|
770 | $hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"}; |
|
|
771 | |
248 | $hdr{"content-length"} = length $arg{body}; |
772 | $hdr{"content-length"} = length $arg{body} |
|
|
773 | if length $arg{body} || $method ne "GET"; |
249 | |
774 | |
250 | my %state; |
775 | my $idempotent = $method =~ /^(?:GET|HEAD|PUT|DELETE|OPTIONS|TRACE)$/; |
251 | |
776 | |
252 | $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { |
777 | # default value for keepalive is true iff the request is for an idempotent method |
253 | $state{fh} = shift |
778 | my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent; |
254 | or return $cb->(undef, { Status => 599, Reason => "$!" }); |
779 | my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy; |
|
|
780 | my $was_persistent; # true if this is actually a recycled connection |
255 | |
781 | |
256 | delete $state{connect_guard}; # reduce memory usage, save a tree |
782 | # the key to use in the keepalive cache |
|
|
783 | my $ka_key = "$uhost\x00$arg{sessionid}"; |
257 | |
784 | |
258 | # get handle |
785 | $hdr{connection} = ($persistent ? $keepalive ? "keep-alive " : "" : "close ") . "Te"; #1.1 |
259 | $state{handle} = new AnyEvent::Handle |
786 | $hdr{te} = "trailers" unless exists $hdr{te}; #1.1 |
260 | fh => $state{fh}, |
|
|
261 | ($scheme eq "https" ? (tls => "connect") : ()); |
|
|
262 | |
787 | |
263 | # limit the number of persistent connections |
788 | my %state = (connect_guard => 1); |
264 | if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { |
|
|
265 | ++$KA_COUNT{$_[1]}; |
|
|
266 | $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; |
|
|
267 | $hdr{connection} = "keep-alive"; |
|
|
268 | delete $hdr{connection}; # keep-alive not yet supported |
|
|
269 | } else { |
|
|
270 | delete $hdr{connection}; |
|
|
271 | } |
|
|
272 | |
789 | |
273 | # (re-)configure handle |
790 | my $ae_error = 595; # connecting |
274 | $state{handle}->timeout ($timeout); |
791 | |
275 | $state{handle}->on_error (sub { |
792 | # handle actual, non-tunneled, request |
276 | %state = (); |
793 | my $handle_actual_request = sub { |
277 | $cb->(undef, { Status => 599, Reason => "$!" }); |
794 | $ae_error = 596; # request phase |
278 | }); |
795 | |
279 | $state{handle}->on_eof (sub { |
796 | my $hdl = $state{handle}; |
280 | %state = (); |
797 | |
281 | $cb->(undef, { Status => 599, Reason => "unexpected end-of-file" }); |
798 | $hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls}; |
282 | }); |
|
|
283 | |
799 | |
284 | # send request |
800 | # send request |
285 | $state{handle}->push_write ( |
801 | $hdl->push_write ( |
286 | "$method $rpath HTTP/1.0\015\012" |
802 | "$method $rpath HTTP/1.1\015\012" |
287 | . (join "", map "$_: $hdr{$_}\015\012", keys %hdr) |
803 | . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) |
288 | . "\015\012" |
804 | . "\015\012" |
289 | . (delete $arg{body}) |
805 | . (delete $arg{body}) |
290 | ); |
806 | ); |
291 | |
807 | |
292 | %hdr = (); # reduce memory usage, save a kitten |
808 | # return if error occured during push_write() |
|
|
809 | return unless %state; |
293 | |
810 | |
|
|
811 | # reduce memory usage, save a kitten, also re-use it for the response headers. |
|
|
812 | %hdr = (); |
|
|
813 | |
294 | # status line |
814 | # status line and headers |
295 | $state{handle}->push_read (line => qr/\015?\012/, sub { |
815 | $state{read_response} = sub { |
296 | $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix |
816 | return unless %state; |
297 | or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])" })); |
|
|
298 | |
817 | |
299 | my %hdr = ( # response headers |
|
|
300 | HTTPVersion => "\x00$1", |
|
|
301 | Status => "\x00$2", |
|
|
302 | Reason => "\x00$3", |
|
|
303 | ); |
|
|
304 | |
|
|
305 | # headers, could be optimized a bit |
|
|
306 | $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { |
|
|
307 | for ("$_[1]\012") { |
818 | for ("$_[1]") { |
308 | # we support spaces in field names, as lotus domino |
819 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
309 | # creates them. |
|
|
310 | $hdr{lc $1} .= "\x00$2" |
|
|
311 | while /\G |
|
|
312 | ([^:\000-\037]+): |
|
|
313 | [\011\040]* |
|
|
314 | ((?: [^\015\012]+ | \015?\012[\011\040] )*) |
|
|
315 | \015?\012 |
|
|
316 | /gxc; |
|
|
317 | |
820 | |
318 | /\G$/ |
821 | /^HTTP\/0*([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/gxci |
|
|
822 | or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" }; |
|
|
823 | |
|
|
824 | # 100 Continue handling |
|
|
825 | # should not happen as we don't send expect: 100-continue, |
|
|
826 | # but we handle it just in case. |
|
|
827 | # since we send the request body regardless, if we get an error |
|
|
828 | # we are out of-sync, which we currently do NOT handle correctly. |
|
|
829 | return $state{handle}->push_read (line => $qr_nlnl, $state{read_response}) |
|
|
830 | if $2 eq 100; |
|
|
831 | |
|
|
832 | push @pseudo, |
|
|
833 | HTTPVersion => $1, |
|
|
834 | Status => $2, |
|
|
835 | Reason => $3, |
|
|
836 | ; |
|
|
837 | |
|
|
838 | my $hdr = _parse_hdr |
319 | or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers" })); |
839 | or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" }; |
|
|
840 | |
|
|
841 | %hdr = (%$hdr, @pseudo); |
|
|
842 | } |
|
|
843 | |
|
|
844 | # redirect handling |
|
|
845 | # microsoft and other shitheads don't give a shit for following standards, |
|
|
846 | # try to support some common forms of broken Location headers. |
|
|
847 | if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { |
|
|
848 | $hdr{location} =~ s/^\.\/+//; |
|
|
849 | |
|
|
850 | my $url = "$rscheme://$uhost:$uport"; |
|
|
851 | |
|
|
852 | unless ($hdr{location} =~ s/^\///) { |
|
|
853 | $url .= $upath; |
|
|
854 | $url =~ s/\/[^\/]*$//; |
320 | } |
855 | } |
321 | |
856 | |
322 | substr $_, 0, 1, "" |
857 | $hdr{location} = "$url/$hdr{location}"; |
323 | for values %hdr; |
858 | } |
324 | |
859 | |
325 | my $finish = sub { |
860 | my $redirect; |
326 | %state = (); |
|
|
327 | |
861 | |
328 | # set-cookie processing |
862 | if ($recurse) { |
329 | if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) { |
863 | my $status = $hdr{Status}; |
330 | for (split /\x00/, $hdr{"set-cookie"}) { |
864 | |
331 | my ($cookie, @arg) = split /;\s*/; |
865 | # industry standard is to redirect POST as GET for |
332 | my ($name, $value) = split /=/, $cookie, 2; |
866 | # 301, 302 and 303, in contrast to HTTP/1.0 and 1.1. |
333 | my %kv = (value => $value, map { split /=/, $_, 2 } @arg); |
867 | # also, the UA should ask the user for 301 and 307 and POST, |
334 | |
868 | # industry standard seems to be to simply follow. |
335 | my $cdom = (delete $kv{domain}) || $uhost; |
869 | # we go with the industry standard. |
336 | my $cpath = (delete $kv{path}) || "/"; |
870 | if ($status == 301 or $status == 302 or $status == 303) { |
337 | |
871 | # HTTP/1.1 is unclear on how to mutate the method |
338 | $cdom =~ s/^.?/./; # make sure it starts with a "." |
872 | $method = "GET" unless $method eq "HEAD"; |
339 | |
873 | $redirect = 1; |
340 | my $ndots = $cdom =~ y/.//; |
874 | } elsif ($status == 307) { |
341 | next if $ndots < ($cdom =~ /[^.]{3}$/ ? 2 : 3); |
875 | $redirect = 1; |
342 | |
|
|
343 | # store it |
|
|
344 | $arg{cookie_jar}{version} = 1; |
|
|
345 | $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv; |
|
|
346 | } |
876 | } |
|
|
877 | } |
|
|
878 | |
|
|
879 | my $finish = sub { # ($data, $err_status, $err_reason[, $persistent]) |
|
|
880 | if ($state{handle}) { |
|
|
881 | # handle keepalive |
|
|
882 | if ( |
|
|
883 | $persistent |
|
|
884 | && $_[3] |
|
|
885 | && ($hdr{HTTPVersion} < 1.1 |
|
|
886 | ? $hdr{connection} =~ /\bkeep-?alive\b/i |
|
|
887 | : $hdr{connection} !~ /\bclose\b/i) |
|
|
888 | ) { |
|
|
889 | ka_store $ka_key, delete $state{handle}; |
|
|
890 | } else { |
|
|
891 | # no keepalive, destroy the handle |
|
|
892 | $state{handle}->destroy; |
347 | } |
893 | } |
|
|
894 | } |
348 | |
895 | |
349 | if ($_[1]{Status} =~ /^x30[12]$/ && $recurse) { |
896 | %state = (); |
350 | # microsoft and other assholes don't give a shit for following standards, |
|
|
351 | # try to support a common form of broken Location header. |
|
|
352 | $_[1]{location} =~ s%^/%$scheme://$uhost:$uport/%; |
|
|
353 | |
897 | |
354 | http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb); |
898 | if (defined $_[1]) { |
|
|
899 | $hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1]; |
|
|
900 | $hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2]; |
|
|
901 | } |
|
|
902 | |
|
|
903 | # set-cookie processing |
|
|
904 | if ($arg{cookie_jar}) { |
|
|
905 | cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date}; |
|
|
906 | } |
|
|
907 | |
|
|
908 | if ($redirect && exists $hdr{location}) { |
|
|
909 | # we ignore any errors, as it is very common to receive |
|
|
910 | # Content-Length != 0 but no actual body |
|
|
911 | # we also access %hdr, as $_[1] might be an erro |
|
|
912 | $state{recurse} = |
|
|
913 | http_request ( |
|
|
914 | $method => $hdr{location}, |
|
|
915 | %arg, |
|
|
916 | recurse => $recurse - 1, |
|
|
917 | Redirect => [$_[0], \%hdr], |
|
|
918 | sub { |
|
|
919 | %state = (); |
|
|
920 | &$cb |
|
|
921 | }, |
|
|
922 | ); |
|
|
923 | } else { |
|
|
924 | $cb->($_[0], \%hdr); |
|
|
925 | } |
|
|
926 | }; |
|
|
927 | |
|
|
928 | $ae_error = 597; # body phase |
|
|
929 | |
|
|
930 | my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct... |
|
|
931 | |
|
|
932 | my $len = $chunked ? undef : $hdr{"content-length"}; |
|
|
933 | |
|
|
934 | # body handling, many different code paths |
|
|
935 | # - no body expected |
|
|
936 | # - want_body_handle |
|
|
937 | # - te chunked |
|
|
938 | # - 2x length known (with or without on_body) |
|
|
939 | # - 2x length not known (with or without on_body) |
|
|
940 | if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { |
|
|
941 | $finish->(undef, 598 => "Request cancelled by on_header"); |
|
|
942 | } elsif ( |
|
|
943 | $hdr{Status} =~ /^(?:1..|204|205|304)$/ |
|
|
944 | or $method eq "HEAD" |
|
|
945 | or (defined $len && $len == 0) # == 0, not !, because "0 " is true |
|
|
946 | ) { |
|
|
947 | # no body |
|
|
948 | $finish->("", undef, undef, 1); |
|
|
949 | |
|
|
950 | } elsif (!$redirect && $arg{want_body_handle}) { |
|
|
951 | $_[0]->on_eof (undef); |
|
|
952 | $_[0]->on_error (undef); |
|
|
953 | $_[0]->on_read (undef); |
|
|
954 | |
|
|
955 | $finish->(delete $state{handle}); |
|
|
956 | |
|
|
957 | } elsif ($chunked) { |
|
|
958 | my $cl = 0; |
|
|
959 | my $body = ""; |
|
|
960 | my $on_body = $arg{on_body} || sub { $body .= shift; 1 }; |
|
|
961 | |
|
|
962 | $state{read_chunk} = sub { |
|
|
963 | $_[1] =~ /^([0-9a-fA-F]+)/ |
|
|
964 | or $finish->(undef, $ae_error => "Garbled chunked transfer encoding"); |
|
|
965 | |
|
|
966 | my $len = hex $1; |
|
|
967 | |
|
|
968 | if ($len) { |
|
|
969 | $cl += $len; |
|
|
970 | |
|
|
971 | $_[0]->push_read (chunk => $len, sub { |
|
|
972 | $on_body->($_[1], \%hdr) |
|
|
973 | or return $finish->(undef, 598 => "Request cancelled by on_body"); |
|
|
974 | |
|
|
975 | $_[0]->push_read (line => sub { |
|
|
976 | length $_[1] |
|
|
977 | and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding"); |
|
|
978 | $_[0]->push_read (line => $state{read_chunk}); |
|
|
979 | }); |
|
|
980 | }); |
355 | } else { |
981 | } else { |
356 | $cb->($_[0], $_[1]); |
982 | $hdr{"content-length"} ||= $cl; |
|
|
983 | |
|
|
984 | $_[0]->push_read (line => $qr_nlnl, sub { |
|
|
985 | if (length $_[1]) { |
|
|
986 | for ("$_[1]") { |
|
|
987 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
|
|
988 | |
|
|
989 | my $hdr = _parse_hdr |
|
|
990 | or return $finish->(undef, $ae_error => "Garbled response trailers"); |
|
|
991 | |
|
|
992 | %hdr = (%hdr, %$hdr); |
|
|
993 | } |
|
|
994 | } |
|
|
995 | |
|
|
996 | $finish->($body, undef, undef, 1); |
|
|
997 | }); |
357 | } |
998 | } |
358 | }; |
999 | }; |
359 | |
1000 | |
360 | if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") { |
1001 | $_[0]->push_read (line => $state{read_chunk}); |
361 | $finish->(undef, \%hdr); |
1002 | |
|
|
1003 | } elsif ($arg{on_body}) { |
|
|
1004 | if (defined $len) { |
|
|
1005 | $_[0]->on_read (sub { |
|
|
1006 | $len -= length $_[0]{rbuf}; |
|
|
1007 | |
|
|
1008 | $arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
|
|
1009 | or return $finish->(undef, 598 => "Request cancelled by on_body"); |
|
|
1010 | |
|
|
1011 | $len > 0 |
|
|
1012 | or $finish->("", undef, undef, 1); |
|
|
1013 | }); |
362 | } else { |
1014 | } else { |
363 | if (exists $hdr{"content-length"}) { |
1015 | $_[0]->on_eof (sub { |
364 | $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { |
|
|
365 | # could cache persistent connection now |
|
|
366 | if ($hdr{connection} =~ /\bkeep-alive\b/i) { |
|
|
367 | # but we don't, due to misdesigns, this is annoyingly complex |
|
|
368 | }; |
|
|
369 | |
|
|
370 | $finish->($_[1], \%hdr); |
1016 | $finish->(""); |
371 | }); |
1017 | }); |
|
|
1018 | $_[0]->on_read (sub { |
|
|
1019 | $arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
|
|
1020 | or $finish->(undef, 598 => "Request cancelled by on_body"); |
|
|
1021 | }); |
|
|
1022 | } |
|
|
1023 | } else { |
|
|
1024 | $_[0]->on_eof (undef); |
|
|
1025 | |
|
|
1026 | if (defined $len) { |
|
|
1027 | $_[0]->on_read (sub { |
|
|
1028 | $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1) |
|
|
1029 | if $len <= length $_[0]{rbuf}; |
|
|
1030 | }); |
372 | } else { |
1031 | } else { |
373 | # too bad, need to read until we get an error or EOF, |
|
|
374 | # no way to detect winged data. |
|
|
375 | $_[0]->on_error (sub { |
1032 | $_[0]->on_error (sub { |
|
|
1033 | ($! == Errno::EPIPE || !$!) |
376 | $finish->($_[0]{rbuf}, \%hdr); |
1034 | ? $finish->(delete $_[0]{rbuf}) |
|
|
1035 | : $finish->(undef, $ae_error => $_[2]); |
377 | }); |
1036 | }); |
378 | $_[0]->on_eof (undef); |
|
|
379 | $_[0]->on_read (sub { }); |
1037 | $_[0]->on_read (sub { }); |
|
|
1038 | } |
|
|
1039 | } |
|
|
1040 | }; |
|
|
1041 | |
|
|
1042 | # if keepalive is enabled, then the server closing the connection |
|
|
1043 | # before a response can happen legally - we retry on idempotent methods. |
|
|
1044 | if ($was_persistent && $idempotent) { |
|
|
1045 | my $old_eof = $hdl->{on_eof}; |
|
|
1046 | $hdl->{on_eof} = sub { |
|
|
1047 | _destroy_state %state; |
|
|
1048 | |
|
|
1049 | %state = (); |
|
|
1050 | $state{recurse} = |
|
|
1051 | http_request ( |
|
|
1052 | $method => $url, |
|
|
1053 | %arg, |
|
|
1054 | keepalive => 0, |
|
|
1055 | sub { |
|
|
1056 | %state = (); |
|
|
1057 | &$cb |
380 | } |
1058 | } |
|
|
1059 | ); |
|
|
1060 | }; |
|
|
1061 | $hdl->on_read (sub { |
|
|
1062 | return unless %state; |
|
|
1063 | |
|
|
1064 | # as soon as we receive something, a connection close |
|
|
1065 | # once more becomes a hard error |
|
|
1066 | $hdl->{on_eof} = $old_eof; |
|
|
1067 | $hdl->push_read (line => $qr_nlnl, $state{read_response}); |
|
|
1068 | }); |
|
|
1069 | } else { |
|
|
1070 | $hdl->push_read (line => $qr_nlnl, $state{read_response}); |
|
|
1071 | } |
|
|
1072 | }; |
|
|
1073 | |
|
|
1074 | my $prepare_handle = sub { |
|
|
1075 | my ($hdl) = $state{handle}; |
|
|
1076 | |
|
|
1077 | $hdl->on_error (sub { |
|
|
1078 | _error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] }; |
|
|
1079 | }); |
|
|
1080 | $hdl->on_eof (sub { |
|
|
1081 | _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" }; |
|
|
1082 | }); |
|
|
1083 | $hdl->timeout_reset; |
|
|
1084 | $hdl->timeout ($timeout); |
|
|
1085 | }; |
|
|
1086 | |
|
|
1087 | # connected to proxy (or origin server) |
|
|
1088 | my $connect_cb = sub { |
|
|
1089 | my $fh = shift |
|
|
1090 | or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" }; |
|
|
1091 | |
|
|
1092 | return unless delete $state{connect_guard}; |
|
|
1093 | |
|
|
1094 | # get handle |
|
|
1095 | $state{handle} = new AnyEvent::Handle |
|
|
1096 | %{ $arg{handle_params} }, |
|
|
1097 | fh => $fh, |
|
|
1098 | peername => $uhost, |
|
|
1099 | tls_ctx => $arg{tls_ctx}, |
|
|
1100 | ; |
|
|
1101 | |
|
|
1102 | $prepare_handle->(); |
|
|
1103 | |
|
|
1104 | #$state{handle}->starttls ("connect") if $rscheme eq "https"; |
|
|
1105 | |
|
|
1106 | # now handle proxy-CONNECT method |
|
|
1107 | if ($proxy && $uscheme eq "https") { |
|
|
1108 | # oh dear, we have to wrap it into a connect request |
|
|
1109 | |
|
|
1110 | # maybe re-use $uauthority with patched port? |
|
|
1111 | $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012"); |
|
|
1112 | $state{handle}->push_read (line => $qr_nlnl, sub { |
|
|
1113 | $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix |
|
|
1114 | or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }; |
|
|
1115 | |
|
|
1116 | if ($2 == 200) { |
|
|
1117 | $rpath = $upath; |
|
|
1118 | $handle_actual_request->(); |
|
|
1119 | } else { |
|
|
1120 | _error %state, $cb, { @pseudo, Status => $2, Reason => $3 }; |
381 | } |
1121 | } |
382 | }); |
1122 | }); |
|
|
1123 | } else { |
|
|
1124 | $handle_actual_request->(); |
383 | }); |
1125 | } |
384 | }, sub { |
|
|
385 | $timeout |
|
|
386 | }; |
1126 | }; |
387 | |
1127 | |
|
|
1128 | _get_slot $uhost, sub { |
|
|
1129 | $state{slot_guard} = shift; |
|
|
1130 | |
|
|
1131 | return unless $state{connect_guard}; |
|
|
1132 | |
|
|
1133 | # try to use an existing keepalive connection, but only if we, ourselves, plan |
|
|
1134 | # on a keepalive request (in theory, this should be a separate config option). |
|
|
1135 | if ($persistent && $KA_CACHE{$ka_key}) { |
|
|
1136 | $was_persistent = 1; |
|
|
1137 | |
|
|
1138 | $state{handle} = ka_fetch $ka_key; |
|
|
1139 | $state{handle}->destroyed |
|
|
1140 | and die "got a destructed habndle. pah\n";#d# |
|
|
1141 | $prepare_handle->(); |
|
|
1142 | $state{handle}->destroyed |
|
|
1143 | and die "got a destructed habndle. pa2\n";#d# |
|
|
1144 | $handle_actual_request->(); |
|
|
1145 | $state{handle}->destroyed |
|
|
1146 | and die "got a destructed habndle. pa3\n";#d# |
|
|
1147 | |
|
|
1148 | } else { |
|
|
1149 | my $tcp_connect = $arg{tcp_connect} |
|
|
1150 | || do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect }; |
|
|
1151 | |
|
|
1152 | $state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout }); |
|
|
1153 | } |
|
|
1154 | }; |
|
|
1155 | |
388 | defined wantarray && AnyEvent::Util::guard { %state = () } |
1156 | defined wantarray && AnyEvent::Util::guard { _destroy_state %state } |
389 | } |
1157 | } |
390 | |
1158 | |
391 | sub http_get($$;@) { |
1159 | sub http_get($@) { |
392 | unshift @_, "GET"; |
1160 | unshift @_, "GET"; |
393 | &http_request |
1161 | &http_request |
394 | } |
1162 | } |
395 | |
1163 | |
396 | sub http_head($$;@) { |
1164 | sub http_head($@) { |
397 | unshift @_, "HEAD"; |
1165 | unshift @_, "HEAD"; |
398 | &http_request |
1166 | &http_request |
399 | } |
1167 | } |
400 | |
1168 | |
401 | sub http_post($$$;@) { |
1169 | sub http_post($$@) { |
|
|
1170 | my $url = shift; |
402 | unshift @_, "POST", "body"; |
1171 | unshift @_, "POST", $url, "body"; |
403 | &http_request |
1172 | &http_request |
404 | } |
1173 | } |
405 | |
1174 | |
406 | =back |
1175 | =back |
407 | |
1176 | |
|
|
1177 | =head2 DNS CACHING |
|
|
1178 | |
|
|
1179 | AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for |
|
|
1180 | the actual connection, which in turn uses AnyEvent::DNS to resolve |
|
|
1181 | hostnames. The latter is a simple stub resolver and does no caching |
|
|
1182 | on its own. If you want DNS caching, you currently have to provide |
|
|
1183 | your own default resolver (by storing a suitable resolver object in |
|
|
1184 | C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback. |
|
|
1185 | |
408 | =head2 GLOBAL FUNCTIONS AND VARIABLES |
1186 | =head2 GLOBAL FUNCTIONS AND VARIABLES |
409 | |
1187 | |
410 | =over 4 |
1188 | =over 4 |
411 | |
1189 | |
412 | =item AnyEvent::HTTP::set_proxy "proxy-url" |
1190 | =item AnyEvent::HTTP::set_proxy "proxy-url" |
413 | |
1191 | |
414 | Sets the default proxy server to use. The proxy-url must begin with a |
1192 | Sets the default proxy server to use. The proxy-url must begin with a |
415 | string of the form C<http://host:port> (optionally C<https:...>). |
1193 | string of the form C<http://host:port>, croaks otherwise. |
|
|
1194 | |
|
|
1195 | To clear an already-set proxy, use C<undef>. |
|
|
1196 | |
|
|
1197 | When AnyEvent::HTTP is laoded for the first time it will query the |
|
|
1198 | default proxy from the operating system, currently by looking at |
|
|
1199 | C<$ENV{http_proxy>}. |
|
|
1200 | |
|
|
1201 | =item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end] |
|
|
1202 | |
|
|
1203 | Remove all cookies from the cookie jar that have been expired. If |
|
|
1204 | C<$session_end> is given and true, then additionally remove all session |
|
|
1205 | cookies. |
|
|
1206 | |
|
|
1207 | You should call this function (with a true C<$session_end>) before you |
|
|
1208 | save cookies to disk, and you should call this function after loading them |
|
|
1209 | again. If you have a long-running program you can additonally call this |
|
|
1210 | function from time to time. |
|
|
1211 | |
|
|
1212 | A cookie jar is initially an empty hash-reference that is managed by this |
|
|
1213 | module. It's format is subject to change, but currently it is like this: |
|
|
1214 | |
|
|
1215 | The key C<version> has to contain C<1>, otherwise the hash gets |
|
|
1216 | emptied. All other keys are hostnames or IP addresses pointing to |
|
|
1217 | hash-references. The key for these inner hash references is the |
|
|
1218 | server path for which this cookie is meant, and the values are again |
|
|
1219 | hash-references. The keys of those hash-references is the cookie name, and |
|
|
1220 | the value, you guessed it, is another hash-reference, this time with the |
|
|
1221 | key-value pairs from the cookie, except for C<expires> and C<max-age>, |
|
|
1222 | which have been replaced by a C<_expires> key that contains the cookie |
|
|
1223 | expiry timestamp. |
|
|
1224 | |
|
|
1225 | Here is an example of a cookie jar with a single cookie, so you have a |
|
|
1226 | chance of understanding the above paragraph: |
|
|
1227 | |
|
|
1228 | { |
|
|
1229 | version => 1, |
|
|
1230 | "10.0.0.1" => { |
|
|
1231 | "/" => { |
|
|
1232 | "mythweb_id" => { |
|
|
1233 | _expires => 1293917923, |
|
|
1234 | value => "ooRung9dThee3ooyXooM1Ohm", |
|
|
1235 | }, |
|
|
1236 | }, |
|
|
1237 | }, |
|
|
1238 | } |
|
|
1239 | |
|
|
1240 | =item $date = AnyEvent::HTTP::format_date $timestamp |
|
|
1241 | |
|
|
1242 | Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP |
|
|
1243 | Date (RFC 2616). |
|
|
1244 | |
|
|
1245 | =item $timestamp = AnyEvent::HTTP::parse_date $date |
|
|
1246 | |
|
|
1247 | Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a |
|
|
1248 | bunch of minor variations of those, and returns the corresponding POSIX |
|
|
1249 | timestamp, or C<undef> if the date cannot be parsed. |
416 | |
1250 | |
417 | =item $AnyEvent::HTTP::MAX_RECURSE |
1251 | =item $AnyEvent::HTTP::MAX_RECURSE |
418 | |
1252 | |
419 | The default value for the C<recurse> request parameter (default: C<10>). |
1253 | The default value for the C<recurse> request parameter (default: C<10>). |
420 | |
1254 | |
|
|
1255 | =item $AnyEvent::HTTP::TIMEOUT |
|
|
1256 | |
|
|
1257 | The default timeout for conenction operations (default: C<300>). |
|
|
1258 | |
421 | =item $AnyEvent::HTTP::USERAGENT |
1259 | =item $AnyEvent::HTTP::USERAGENT |
422 | |
1260 | |
423 | The default value for the C<User-Agent> header (the default is |
1261 | The default value for the C<User-Agent> header (the default is |
424 | C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). |
1262 | C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). |
425 | |
1263 | |
426 | =item $AnyEvent::HTTP::MAX_PERSISTENT |
1264 | =item $AnyEvent::HTTP::MAX_PER_HOST |
427 | |
1265 | |
428 | The maximum number of persistent connections to keep open (default: 8). |
1266 | The maximum number of concurrent connections to the same host (identified |
|
|
1267 | by the hostname). If the limit is exceeded, then the additional requests |
|
|
1268 | are queued until previous connections are closed. Both persistent and |
|
|
1269 | non-persistent connections are counted in this limit. |
429 | |
1270 | |
430 | Not implemented currently. |
1271 | The default value for this is C<4>, and it is highly advisable to not |
|
|
1272 | increase it much. |
|
|
1273 | |
|
|
1274 | For comparison: the RFC's recommend 4 non-persistent or 2 persistent |
|
|
1275 | connections, older browsers used 2, newers (such as firefox 3) typically |
|
|
1276 | use 6, and Opera uses 8 because like, they have the fastest browser and |
|
|
1277 | give a shit for everybody else on the planet. |
431 | |
1278 | |
432 | =item $AnyEvent::HTTP::PERSISTENT_TIMEOUT |
1279 | =item $AnyEvent::HTTP::PERSISTENT_TIMEOUT |
433 | |
1280 | |
434 | The maximum time to cache a persistent connection, in seconds (default: 2). |
1281 | The time after which idle persistent conenctions get closed by |
|
|
1282 | AnyEvent::HTTP (default: C<3>). |
435 | |
1283 | |
436 | Not implemented currently. |
1284 | =item $AnyEvent::HTTP::ACTIVE |
|
|
1285 | |
|
|
1286 | The number of active connections. This is not the number of currently |
|
|
1287 | running requests, but the number of currently open and non-idle TCP |
|
|
1288 | connections. This number can be useful for load-leveling. |
437 | |
1289 | |
438 | =back |
1290 | =back |
439 | |
1291 | |
440 | =cut |
1292 | =cut |
441 | |
1293 | |
|
|
1294 | our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec); |
|
|
1295 | our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat); |
|
|
1296 | |
|
|
1297 | sub format_date($) { |
|
|
1298 | my ($time) = @_; |
|
|
1299 | |
|
|
1300 | # RFC 822/1123 format |
|
|
1301 | my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time; |
|
|
1302 | |
|
|
1303 | sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT", |
|
|
1304 | $weekday[$wday], $mday, $month[$mon], $year + 1900, |
|
|
1305 | $H, $M, $S; |
|
|
1306 | } |
|
|
1307 | |
|
|
1308 | sub parse_date($) { |
|
|
1309 | my ($date) = @_; |
|
|
1310 | |
|
|
1311 | my ($d, $m, $y, $H, $M, $S); |
|
|
1312 | |
|
|
1313 | if ($date =~ /^[A-Z][a-z][a-z]+, ([0-9][0-9]?)[\- ]([A-Z][a-z][a-z])[\- ]([0-9][0-9][0-9][0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) GMT$/) { |
|
|
1314 | # RFC 822/1123, required by RFC 2616 (with " ") |
|
|
1315 | # cookie dates (with "-") |
|
|
1316 | |
|
|
1317 | ($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6); |
|
|
1318 | |
|
|
1319 | } elsif ($date =~ /^[A-Z][a-z][a-z]+, ([0-9][0-9]?)-([A-Z][a-z][a-z])-([0-9][0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) GMT$/) { |
|
|
1320 | # RFC 850 |
|
|
1321 | ($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6); |
|
|
1322 | |
|
|
1323 | } elsif ($date =~ /^[A-Z][a-z][a-z]+ ([A-Z][a-z][a-z]) ([0-9 ]?[0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) ([0-9][0-9][0-9][0-9])$/) { |
|
|
1324 | # ISO C's asctime |
|
|
1325 | ($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5); |
|
|
1326 | } |
|
|
1327 | # other formats fail in the loop below |
|
|
1328 | |
|
|
1329 | for (0..11) { |
|
|
1330 | if ($m eq $month[$_]) { |
|
|
1331 | require Time::Local; |
|
|
1332 | return Time::Local::timegm ($S, $M, $H, $d, $_, $y); |
|
|
1333 | } |
|
|
1334 | } |
|
|
1335 | |
|
|
1336 | undef |
|
|
1337 | } |
|
|
1338 | |
442 | sub set_proxy($) { |
1339 | sub set_proxy($) { |
443 | $PROXY = [$2, $3 || 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix; |
1340 | if (length $_[0]) { |
|
|
1341 | $_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix |
|
|
1342 | or Carp::croak "$_[0]: invalid proxy URL"; |
|
|
1343 | $PROXY = [$2, $3 || 3128, $1] |
|
|
1344 | } else { |
|
|
1345 | undef $PROXY; |
|
|
1346 | } |
444 | } |
1347 | } |
445 | |
1348 | |
446 | # initialise proxy from environment |
1349 | # initialise proxy from environment |
|
|
1350 | eval { |
447 | set_proxy $ENV{http_proxy}; |
1351 | set_proxy $ENV{http_proxy}; |
|
|
1352 | }; |
|
|
1353 | |
|
|
1354 | =head2 SHOWCASE |
|
|
1355 | |
|
|
1356 | This section contaisn some more elaborate "real-world" examples or code |
|
|
1357 | snippets. |
|
|
1358 | |
|
|
1359 | =head2 HTTP/1.1 FILE DOWNLOAD |
|
|
1360 | |
|
|
1361 | Downloading files with HTTP can be quite tricky, especially when something |
|
|
1362 | goes wrong and you want to resume. |
|
|
1363 | |
|
|
1364 | Here is a function that initiates and resumes a download. It uses the |
|
|
1365 | last modified time to check for file content changes, and works with many |
|
|
1366 | HTTP/1.0 servers as well, and usually falls back to a complete re-download |
|
|
1367 | on older servers. |
|
|
1368 | |
|
|
1369 | It calls the completion callback with either C<undef>, which means a |
|
|
1370 | nonretryable error occured, C<0> when the download was partial and should |
|
|
1371 | be retried, and C<1> if it was successful. |
|
|
1372 | |
|
|
1373 | use AnyEvent::HTTP; |
|
|
1374 | |
|
|
1375 | sub download($$$) { |
|
|
1376 | my ($url, $file, $cb) = @_; |
|
|
1377 | |
|
|
1378 | open my $fh, "+<", $file |
|
|
1379 | or die "$file: $!"; |
|
|
1380 | |
|
|
1381 | my %hdr; |
|
|
1382 | my $ofs = 0; |
|
|
1383 | |
|
|
1384 | warn stat $fh; |
|
|
1385 | warn -s _; |
|
|
1386 | if (stat $fh and -s _) { |
|
|
1387 | $ofs = -s _; |
|
|
1388 | warn "-s is ", $ofs;#d# |
|
|
1389 | $hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9]; |
|
|
1390 | $hdr{"range"} = "bytes=$ofs-"; |
|
|
1391 | } |
|
|
1392 | |
|
|
1393 | http_get $url, |
|
|
1394 | headers => \%hdr, |
|
|
1395 | on_header => sub { |
|
|
1396 | my ($hdr) = @_; |
|
|
1397 | |
|
|
1398 | if ($hdr->{Status} == 200 && $ofs) { |
|
|
1399 | # resume failed |
|
|
1400 | truncate $fh, $ofs = 0; |
|
|
1401 | } |
|
|
1402 | |
|
|
1403 | sysseek $fh, $ofs, 0; |
|
|
1404 | |
|
|
1405 | 1 |
|
|
1406 | }, |
|
|
1407 | on_body => sub { |
|
|
1408 | my ($data, $hdr) = @_; |
|
|
1409 | |
|
|
1410 | if ($hdr->{Status} =~ /^2/) { |
|
|
1411 | length $data == syswrite $fh, $data |
|
|
1412 | or return; # abort on write errors |
|
|
1413 | } |
|
|
1414 | |
|
|
1415 | 1 |
|
|
1416 | }, |
|
|
1417 | sub { |
|
|
1418 | my (undef, $hdr) = @_; |
|
|
1419 | |
|
|
1420 | my $status = $hdr->{Status}; |
|
|
1421 | |
|
|
1422 | if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) { |
|
|
1423 | utime $fh, $time, $time; |
|
|
1424 | } |
|
|
1425 | |
|
|
1426 | if ($status == 200 || $status == 206 || $status == 416) { |
|
|
1427 | # download ok || resume ok || file already fully downloaded |
|
|
1428 | $cb->(1, $hdr); |
|
|
1429 | |
|
|
1430 | } elsif ($status == 412) { |
|
|
1431 | # file has changed while resuming, delete and retry |
|
|
1432 | unlink $file; |
|
|
1433 | $cb->(0, $hdr); |
|
|
1434 | |
|
|
1435 | } elsif ($status == 500 or $status == 503 or $status =~ /^59/) { |
|
|
1436 | # retry later |
|
|
1437 | $cb->(0, $hdr); |
|
|
1438 | |
|
|
1439 | } else { |
|
|
1440 | $cb->(undef, $hdr); |
|
|
1441 | } |
|
|
1442 | } |
|
|
1443 | ; |
|
|
1444 | } |
|
|
1445 | |
|
|
1446 | download "http://server/somelargefile", "/tmp/somelargefile", sub { |
|
|
1447 | if ($_[0]) { |
|
|
1448 | print "OK!\n"; |
|
|
1449 | } elsif (defined $_[0]) { |
|
|
1450 | print "please retry later\n"; |
|
|
1451 | } else { |
|
|
1452 | print "ERROR\n"; |
|
|
1453 | } |
|
|
1454 | }; |
|
|
1455 | |
|
|
1456 | =head3 SOCKS PROXIES |
|
|
1457 | |
|
|
1458 | Socks proxies are not directly supported by AnyEvent::HTTP. You can |
|
|
1459 | compile your perl to support socks, or use an external program such as |
|
|
1460 | F<socksify> (dante) or F<tsocks> to make your program use a socks proxy |
|
|
1461 | transparently. |
|
|
1462 | |
|
|
1463 | Alternatively, for AnyEvent::HTTP only, you can use your own |
|
|
1464 | C<tcp_connect> function that does the proxy handshake - here is an example |
|
|
1465 | that works with socks4a proxies: |
|
|
1466 | |
|
|
1467 | use Errno; |
|
|
1468 | use AnyEvent::Util; |
|
|
1469 | use AnyEvent::Socket; |
|
|
1470 | use AnyEvent::Handle; |
|
|
1471 | |
|
|
1472 | # host, port and username of/for your socks4a proxy |
|
|
1473 | my $socks_host = "10.0.0.23"; |
|
|
1474 | my $socks_port = 9050; |
|
|
1475 | my $socks_user = ""; |
|
|
1476 | |
|
|
1477 | sub socks4a_connect { |
|
|
1478 | my ($host, $port, $connect_cb, $prepare_cb) = @_; |
|
|
1479 | |
|
|
1480 | my $hdl = new AnyEvent::Handle |
|
|
1481 | connect => [$socks_host, $socks_port], |
|
|
1482 | on_prepare => sub { $prepare_cb->($_[0]{fh}) }, |
|
|
1483 | on_error => sub { $connect_cb->() }, |
|
|
1484 | ; |
|
|
1485 | |
|
|
1486 | $hdl->push_write (pack "CCnNZ*Z*", 4, 1, $port, 1, $socks_user, $host); |
|
|
1487 | |
|
|
1488 | $hdl->push_read (chunk => 8, sub { |
|
|
1489 | my ($hdl, $chunk) = @_; |
|
|
1490 | my ($status, $port, $ipn) = unpack "xCna4", $chunk; |
|
|
1491 | |
|
|
1492 | if ($status == 0x5a) { |
|
|
1493 | $connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port"); |
|
|
1494 | } else { |
|
|
1495 | $! = Errno::ENXIO; $connect_cb->(); |
|
|
1496 | } |
|
|
1497 | }); |
|
|
1498 | |
|
|
1499 | $hdl |
|
|
1500 | } |
|
|
1501 | |
|
|
1502 | Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s, |
|
|
1503 | possibly after switching off other proxy types: |
|
|
1504 | |
|
|
1505 | AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies |
|
|
1506 | |
|
|
1507 | http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub { |
|
|
1508 | my ($data, $headers) = @_; |
|
|
1509 | ... |
|
|
1510 | }; |
448 | |
1511 | |
449 | =head1 SEE ALSO |
1512 | =head1 SEE ALSO |
450 | |
1513 | |
451 | L<AnyEvent>. |
1514 | L<AnyEvent>. |
452 | |
1515 | |
453 | =head1 AUTHOR |
1516 | =head1 AUTHOR |
454 | |
1517 | |
455 | Marc Lehmann <schmorp@schmorp.de> |
1518 | Marc Lehmann <schmorp@schmorp.de> |
456 | http://home.schmorp.de/ |
1519 | http://home.schmorp.de/ |
|
|
1520 | |
|
|
1521 | With many thanks to Дмитрий Шалашов, who provided countless |
|
|
1522 | testcases and bugreports. |
457 | |
1523 | |
458 | =cut |
1524 | =cut |
459 | |
1525 | |
460 | 1 |
1526 | 1 |
461 | |
1527 | |