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39 | package AnyEvent::HTTP; |
39 | package AnyEvent::HTTP; |
40 | |
40 | |
41 | use strict; |
41 | use strict; |
42 | no warnings; |
42 | no warnings; |
43 | |
43 | |
44 | use Carp; |
44 | use Errno (); |
45 | |
45 | |
46 | use AnyEvent (); |
46 | use AnyEvent 5.0 (); |
47 | use AnyEvent::Util (); |
47 | use AnyEvent::Util (); |
48 | use AnyEvent::Socket (); |
48 | use AnyEvent::Socket (); |
49 | use AnyEvent::Handle (); |
49 | use AnyEvent::Handle (); |
50 | |
50 | |
51 | use base Exporter::; |
51 | use base Exporter::; |
52 | |
52 | |
53 | our $VERSION = '1.03'; |
53 | our $VERSION = '1.44'; |
54 | |
54 | |
55 | our @EXPORT = qw(http_get http_post http_head http_request); |
55 | our @EXPORT = qw(http_get http_post http_head http_request); |
56 | |
56 | |
57 | our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; |
57 | our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; |
58 | our $MAX_RECURSE = 10; |
58 | our $MAX_RECURSE = 10; |
59 | our $MAX_PERSISTENT = 8; |
59 | our $MAX_PERSISTENT = 8; |
60 | our $PERSISTENT_TIMEOUT = 2; |
60 | our $PERSISTENT_TIMEOUT = 2; |
61 | our $TIMEOUT = 300; |
61 | our $TIMEOUT = 300; |
62 | |
62 | |
63 | # changing these is evil |
63 | # changing these is evil |
64 | our $MAX_PERSISTENT_PER_HOST = 2; |
64 | our $MAX_PERSISTENT_PER_HOST = 0; |
65 | our $MAX_PER_HOST = 4; |
65 | our $MAX_PER_HOST = 4; |
66 | |
66 | |
67 | our $PROXY; |
67 | our $PROXY; |
68 | our $ACTIVE = 0; |
68 | our $ACTIVE = 0; |
69 | |
69 | |
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71 | my %CO_SLOT; # number of open connections, and wait queue, per host |
71 | my %CO_SLOT; # number of open connections, and wait queue, per host |
72 | |
72 | |
73 | =item http_get $url, key => value..., $cb->($data, $headers) |
73 | =item http_get $url, key => value..., $cb->($data, $headers) |
74 | |
74 | |
75 | Executes an HTTP-GET request. See the http_request function for details on |
75 | Executes an HTTP-GET request. See the http_request function for details on |
76 | additional parameters. |
76 | additional parameters and the return value. |
77 | |
77 | |
78 | =item http_head $url, key => value..., $cb->($data, $headers) |
78 | =item http_head $url, key => value..., $cb->($data, $headers) |
79 | |
79 | |
80 | Executes an HTTP-HEAD request. See the http_request function for details on |
80 | Executes an HTTP-HEAD request. See the http_request function for details |
81 | additional parameters. |
81 | on additional parameters and the return value. |
82 | |
82 | |
83 | =item http_post $url, $body, key => value..., $cb->($data, $headers) |
83 | =item http_post $url, $body, key => value..., $cb->($data, $headers) |
84 | |
84 | |
85 | Executes an HTTP-POST request with a request body of C<$bod>. See the |
85 | Executes an HTTP-POST request with a request body of C<$body>. See the |
86 | http_request function for details on additional parameters. |
86 | http_request function for details on additional parameters and the return |
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87 | value. |
87 | |
88 | |
88 | =item http_request $method => $url, key => value..., $cb->($data, $headers) |
89 | =item http_request $method => $url, key => value..., $cb->($data, $headers) |
89 | |
90 | |
90 | Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL |
91 | Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL |
91 | must be an absolute http or https URL. |
92 | must be an absolute http or https URL. |
92 | |
93 | |
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94 | When called in void context, nothing is returned. In other contexts, |
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95 | C<http_request> returns a "cancellation guard" - you have to keep the |
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96 | object at least alive until the callback get called. If the object gets |
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97 | destroyed before the callbakc is called, the request will be cancelled. |
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98 | |
93 | The callback will be called with the response data as first argument |
99 | The callback will be called with the response body data as first argument |
94 | (or C<undef> if it wasn't available due to errors), and a hash-ref with |
100 | (or C<undef> if an error occured), and a hash-ref with response headers as |
95 | response headers as second argument. |
101 | second argument. |
96 | |
102 | |
97 | All the headers in that hash are lowercased. In addition to the response |
103 | All the headers in that hash are lowercased. In addition to the response |
98 | headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason> |
104 | headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason> |
99 | contain the three parts of the HTTP Status-Line of the same name. The |
105 | contain the three parts of the HTTP Status-Line of the same name. The |
100 | pseudo-header C<URL> contains the original URL (which can differ from the |
106 | pseudo-header C<URL> contains the original URL (which can differ from the |
101 | requested URL when following redirects). |
107 | requested URL when following redirects). |
102 | |
108 | |
103 | If the server sends a header multiple lines, then their contents will be |
109 | If the server sends a header multiple times, then their contents will be |
104 | joined together with C<\x00>. |
110 | joined together with a comma (C<,>), as per the HTTP spec. |
105 | |
111 | |
106 | If an internal error occurs, such as not being able to resolve a hostname, |
112 | If an internal error occurs, such as not being able to resolve a hostname, |
107 | then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599> |
113 | then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x> |
108 | and the C<Reason> pseudo-header will contain an error message. |
114 | (usually C<599>) and the C<Reason> pseudo-header will contain an error |
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115 | message. |
109 | |
116 | |
110 | A typical callback might look like this: |
117 | A typical callback might look like this: |
111 | |
118 | |
112 | sub { |
119 | sub { |
113 | my ($body, $hdr) = @_; |
120 | my ($body, $hdr) = @_; |
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131 | |
138 | |
132 | =item headers => hashref |
139 | =item headers => hashref |
133 | |
140 | |
134 | The request headers to use. Currently, C<http_request> may provide its |
141 | The request headers to use. Currently, C<http_request> may provide its |
135 | own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers |
142 | own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers |
136 | and will provide defaults for C<User-Agent:> and C<Referer:>. |
143 | and will provide defaults for C<User-Agent:> and C<Referer:> (this can be |
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144 | suppressed by using C<undef> for these headers in which case they won't be |
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145 | sent at all). |
137 | |
146 | |
138 | =item timeout => $seconds |
147 | =item timeout => $seconds |
139 | |
148 | |
140 | The time-out to use for various stages - each connect attempt will reset |
149 | The time-out to use for various stages - each connect attempt will reset |
141 | the timeout, as will read or write activity. Default timeout is 5 minutes. |
150 | the timeout, as will read or write activity, i.e. this is not an overall |
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151 | timeout. |
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152 | |
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153 | Default timeout is 5 minutes. |
142 | |
154 | |
143 | =item proxy => [$host, $port[, $scheme]] or undef |
155 | =item proxy => [$host, $port[, $scheme]] or undef |
144 | |
156 | |
145 | Use the given http proxy for all requests. If not specified, then the |
157 | Use the given http proxy for all requests. If not specified, then the |
146 | default proxy (as specified by C<$ENV{http_proxy}>) is used. |
158 | default proxy (as specified by C<$ENV{http_proxy}>) is used. |
147 | |
159 | |
148 | C<$scheme> must be either missing or C<http> for HTTP, or C<https> for |
160 | C<$scheme> must be either missing, C<http> for HTTP or C<https> for |
149 | HTTPS. |
161 | HTTPS. |
150 | |
162 | |
151 | =item body => $string |
163 | =item body => $string |
152 | |
164 | |
153 | The request body, usually empty. Will be-sent as-is (future versions of |
165 | The request body, usually empty. Will be-sent as-is (future versions of |
… | |
… | |
159 | based on the original netscape specification. |
171 | based on the original netscape specification. |
160 | |
172 | |
161 | The C<$hash_ref> must be an (initially empty) hash reference which will |
173 | The C<$hash_ref> must be an (initially empty) hash reference which will |
162 | get updated automatically. It is possible to save the cookie_jar to |
174 | get updated automatically. It is possible to save the cookie_jar to |
163 | persistent storage with something like JSON or Storable, but this is not |
175 | persistent storage with something like JSON or Storable, but this is not |
164 | recommended, as expire times are currently being ignored. |
176 | recommended, as expiry times are currently being ignored. |
165 | |
177 | |
166 | Note that this cookie implementation is not of very high quality, nor |
178 | Note that this cookie implementation is not of very high quality, nor |
167 | meant to be complete. If you want complete cookie management you have to |
179 | meant to be complete. If you want complete cookie management you have to |
168 | do that on your own. C<cookie_jar> is meant as a quick fix to get some |
180 | do that on your own. C<cookie_jar> is meant as a quick fix to get some |
169 | cookie-using sites working. Cookies are a privacy disaster, do not use |
181 | cookie-using sites working. Cookies are a privacy disaster, do not use |
170 | them unless required to. |
182 | them unless required to. |
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183 | |
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184 | =item tls_ctx => $scheme | $tls_ctx |
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185 | |
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186 | Specifies the AnyEvent::TLS context to be used for https connections. This |
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187 | parameter follows the same rules as the C<tls_ctx> parameter to |
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188 | L<AnyEvent::Handle>, but additionally, the two strings C<low> or |
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189 | C<high> can be specified, which give you a predefined low-security (no |
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190 | verification, highest compatibility) and high-security (CA and common-name |
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191 | verification) TLS context. |
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192 | |
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193 | The default for this option is C<low>, which could be interpreted as "give |
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194 | me the page, no matter what". |
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195 | |
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196 | =item on_prepare => $callback->($fh) |
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197 | |
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198 | In rare cases you need to "tune" the socket before it is used to |
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199 | connect (for exmaple, to bind it on a given IP address). This parameter |
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200 | overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect> |
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201 | and behaves exactly the same way (e.g. it has to provide a |
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202 | timeout). See the description for the C<$prepare_cb> argument of |
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203 | C<AnyEvent::Socket::tcp_connect> for details. |
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204 | |
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205 | =item on_header => $callback->($headers) |
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206 | |
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207 | When specified, this callback will be called with the header hash as soon |
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208 | as headers have been successfully received from the remote server (not on |
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209 | locally-generated errors). |
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210 | |
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211 | It has to return either true (in which case AnyEvent::HTTP will continue), |
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212 | or false, in which case AnyEvent::HTTP will cancel the download (and call |
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213 | the finish callback with an error code of C<598>). |
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214 | |
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215 | This callback is useful, among other things, to quickly reject unwanted |
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216 | content, which, if it is supposed to be rare, can be faster than first |
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217 | doing a C<HEAD> request. |
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218 | |
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219 | Example: cancel the request unless the content-type is "text/html". |
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220 | |
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221 | on_header => sub { |
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222 | $_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/ |
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223 | }, |
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224 | |
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225 | =item on_body => $callback->($partial_body, $headers) |
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226 | |
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227 | When specified, all body data will be passed to this callback instead of |
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228 | to the completion callback. The completion callback will get the empty |
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229 | string instead of the body data. |
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230 | |
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231 | It has to return either true (in which case AnyEvent::HTTP will continue), |
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232 | or false, in which case AnyEvent::HTTP will cancel the download (and call |
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233 | the completion callback with an error code of C<598>). |
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234 | |
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235 | This callback is useful when the data is too large to be held in memory |
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236 | (so the callback writes it to a file) or when only some information should |
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237 | be extracted, or when the body should be processed incrementally. |
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238 | |
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239 | It is usually preferred over doing your own body handling via |
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240 | C<want_body_handle>, but in case of streaming APIs, where HTTP is |
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241 | only used to create a connection, C<want_body_handle> is the better |
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242 | alternative, as it allows you to install your own event handler, reducing |
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243 | resource usage. |
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244 | |
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245 | =item want_body_handle => $enable |
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246 | |
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247 | When enabled (default is disabled), the behaviour of AnyEvent::HTTP |
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248 | changes considerably: after parsing the headers, and instead of |
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249 | downloading the body (if any), the completion callback will be |
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250 | called. Instead of the C<$body> argument containing the body data, the |
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251 | callback will receive the L<AnyEvent::Handle> object associated with the |
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252 | connection. In error cases, C<undef> will be passed. When there is no body |
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253 | (e.g. status C<304>), the empty string will be passed. |
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254 | |
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255 | The handle object might or might not be in TLS mode, might be connected to |
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256 | a proxy, be a persistent connection etc., and configured in unspecified |
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257 | ways. The user is responsible for this handle (it will not be used by this |
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258 | module anymore). |
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259 | |
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260 | This is useful with some push-type services, where, after the initial |
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261 | headers, an interactive protocol is used (typical example would be the |
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262 | push-style twitter API which starts a JSON/XML stream). |
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263 | |
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264 | If you think you need this, first have a look at C<on_body>, to see if |
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265 | that doesn't solve your problem in a better way. |
171 | |
266 | |
172 | =back |
267 | =back |
173 | |
268 | |
174 | Example: make a simple HTTP GET request for http://www.nethype.de/ |
269 | Example: make a simple HTTP GET request for http://www.nethype.de/ |
175 | |
270 | |
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188 | my ($body, $hdr) = @_; |
283 | my ($body, $hdr) = @_; |
189 | use Data::Dumper; |
284 | use Data::Dumper; |
190 | print Dumper $hdr; |
285 | print Dumper $hdr; |
191 | } |
286 | } |
192 | ; |
287 | ; |
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288 | |
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289 | Example: make another simple HTTP GET request, but immediately try to |
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290 | cancel it. |
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291 | |
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292 | my $request = http_request GET => "http://www.nethype.de/", sub { |
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293 | my ($body, $hdr) = @_; |
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294 | print "$body\n"; |
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295 | }; |
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296 | |
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297 | undef $request; |
193 | |
298 | |
194 | =cut |
299 | =cut |
195 | |
300 | |
196 | sub _slot_schedule; |
301 | sub _slot_schedule; |
197 | sub _slot_schedule($) { |
302 | sub _slot_schedule($) { |
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221 | push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; |
326 | push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; |
222 | |
327 | |
223 | _slot_schedule $_[0]; |
328 | _slot_schedule $_[0]; |
224 | } |
329 | } |
225 | |
330 | |
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331 | our $qr_nl = qr{\015?\012}; |
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332 | our $qr_nlnl = qr{(?<![^\012])\015?\012}; |
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333 | |
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334 | our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; |
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335 | our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; |
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336 | |
226 | sub http_request($$@) { |
337 | sub http_request($$@) { |
227 | my $cb = pop; |
338 | my $cb = pop; |
228 | my ($method, $url, %arg) = @_; |
339 | my ($method, $url, %arg) = @_; |
229 | |
340 | |
230 | my %hdr; |
341 | my %hdr; |
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342 | |
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343 | $arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" || !exists $arg{tls_ctx}; |
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344 | $arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high"; |
231 | |
345 | |
232 | $method = uc $method; |
346 | $method = uc $method; |
233 | |
347 | |
234 | if (my $hdr = $arg{headers}) { |
348 | if (my $hdr = $arg{headers}) { |
235 | while (my ($k, $v) = each %$hdr) { |
349 | while (my ($k, $v) = each %$hdr) { |
… | |
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237 | } |
351 | } |
238 | } |
352 | } |
239 | |
353 | |
240 | my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; |
354 | my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; |
241 | |
355 | |
242 | return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url }) |
356 | return $cb->(undef, { Status => 599, Reason => "Too many redirections", URL => $url }) |
243 | if $recurse < 0; |
357 | if $recurse < 0; |
244 | |
358 | |
245 | my $proxy = $arg{proxy} || $PROXY; |
359 | my $proxy = $arg{proxy} || $PROXY; |
246 | my $timeout = $arg{timeout} || $TIMEOUT; |
360 | my $timeout = $arg{timeout} || $TIMEOUT; |
247 | |
361 | |
248 | $hdr{"user-agent"} ||= $USERAGENT; |
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249 | |
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250 | my ($scheme, $authority, $upath, $query, $fragment) = |
362 | my ($uscheme, $uauthority, $upath, $query, $fragment) = |
251 | $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; |
363 | $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; |
252 | |
364 | |
253 | $scheme = lc $scheme; |
365 | $uscheme = lc $uscheme; |
254 | |
366 | |
255 | my $uport = $scheme eq "http" ? 80 |
367 | my $uport = $uscheme eq "http" ? 80 |
256 | : $scheme eq "https" ? 443 |
368 | : $uscheme eq "https" ? 443 |
257 | : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url }); |
369 | : return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", URL => $url }); |
258 | |
370 | |
259 | $hdr{referer} ||= "$scheme://$authority$upath"; # leave out fragment and query string, just a heuristic |
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260 | |
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261 | $authority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x |
371 | $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x |
262 | or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url }); |
372 | or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", URL => $url }); |
263 | |
373 | |
264 | my $uhost = $1; |
374 | my $uhost = $1; |
265 | $uport = $2 if defined $2; |
375 | $uport = $2 if defined $2; |
266 | |
376 | |
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377 | $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost" |
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378 | unless exists $hdr{host}; |
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379 | |
267 | $uhost =~ s/^\[(.*)\]$/$1/; |
380 | $uhost =~ s/^\[(.*)\]$/$1/; |
268 | $upath .= "?$query" if length $query; |
381 | $upath .= "?$query" if length $query; |
269 | |
382 | |
270 | $upath =~ s%^/?%/%; |
383 | $upath =~ s%^/?%/%; |
271 | |
384 | |
272 | # cookie processing |
385 | # cookie processing |
273 | if (my $jar = $arg{cookie_jar}) { |
386 | if (my $jar = $arg{cookie_jar}) { |
274 | %$jar = () if $jar->{version} < 1; |
387 | %$jar = () if $jar->{version} != 1; |
275 | |
388 | |
276 | my @cookie; |
389 | my @cookie; |
277 | |
390 | |
278 | while (my ($chost, $v) = each %$jar) { |
391 | while (my ($chost, $v) = each %$jar) { |
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392 | if ($chost =~ /^\./) { |
279 | next unless $chost eq substr $uhost, -length $chost; |
393 | next unless $chost eq substr $uhost, -length $chost; |
280 | next unless $chost =~ /^\./; |
394 | } elsif ($chost =~ /\./) { |
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395 | next unless $chost eq $uhost; |
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396 | } else { |
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397 | next; |
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398 | } |
281 | |
399 | |
282 | while (my ($cpath, $v) = each %$v) { |
400 | while (my ($cpath, $v) = each %$v) { |
283 | next unless $cpath eq substr $upath, 0, length $cpath; |
401 | next unless $cpath eq substr $upath, 0, length $cpath; |
284 | |
402 | |
285 | while (my ($k, $v) = each %$v) { |
403 | while (my ($k, $v) = each %$v) { |
286 | next if $scheme ne "https" && exists $v->{secure}; |
404 | next if $uscheme ne "https" && exists $v->{secure}; |
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405 | my $value = $v->{value}; |
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406 | $value =~ s/([\\"])/\\$1/g; |
287 | push @cookie, "$k=$v->{value}"; |
407 | push @cookie, "$k=\"$value\""; |
288 | } |
408 | } |
289 | } |
409 | } |
290 | } |
410 | } |
291 | |
411 | |
292 | $hdr{cookie} = join "; ", @cookie |
412 | $hdr{cookie} = join "; ", @cookie |
293 | if @cookie; |
413 | if @cookie; |
294 | } |
414 | } |
295 | |
415 | |
296 | my ($rhost, $rport, $rpath); # request host, port, path |
416 | my ($rhost, $rport, $rscheme, $rpath); # request host, port, path |
297 | |
417 | |
298 | if ($proxy) { |
418 | if ($proxy) { |
299 | ($rhost, $rport, $scheme) = @$proxy; |
419 | ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy); |
300 | $rpath = $url; |
420 | |
|
|
421 | $rscheme = "http" unless defined $rscheme; |
|
|
422 | |
|
|
423 | # don't support https requests over https-proxy transport, |
|
|
424 | # can't be done with tls as spec'ed, unless you double-encrypt. |
|
|
425 | $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; |
301 | } else { |
426 | } else { |
302 | ($rhost, $rport, $rpath) = ($uhost, $uport, $upath); |
427 | ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); |
303 | $hdr{host} = $uhost; |
|
|
304 | } |
428 | } |
305 | |
429 | |
|
|
430 | # leave out fragment and query string, just a heuristic |
|
|
431 | $hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer}; |
|
|
432 | $hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"}; |
|
|
433 | |
306 | $hdr{"content-length"} = length $arg{body}; |
434 | $hdr{"content-length"} = length $arg{body} |
|
|
435 | if length $arg{body} || $method ne "GET"; |
307 | |
436 | |
308 | my %state = (connect_guard => 1); |
437 | my %state = (connect_guard => 1); |
309 | |
438 | |
310 | _get_slot $uhost, sub { |
439 | _get_slot $uhost, sub { |
311 | $state{slot_guard} = shift; |
440 | $state{slot_guard} = shift; |
312 | |
441 | |
313 | return unless $state{connect_guard}; |
442 | return unless $state{connect_guard}; |
314 | |
443 | |
315 | $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { |
444 | $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { |
316 | $state{fh} = shift |
445 | $state{fh} = shift |
|
|
446 | or do { |
|
|
447 | my $err = "$!"; |
|
|
448 | %state = (); |
317 | or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url }); |
449 | return $cb->(undef, { Status => 599, Reason => $err, URL => $url }); |
|
|
450 | }; |
318 | |
451 | |
319 | delete $state{connect_guard}; # reduce memory usage, save a tree |
452 | pop; # free memory, save a tree |
|
|
453 | |
|
|
454 | return unless delete $state{connect_guard}; |
320 | |
455 | |
321 | # get handle |
456 | # get handle |
322 | $state{handle} = new AnyEvent::Handle |
457 | $state{handle} = new AnyEvent::Handle |
323 | fh => $state{fh}, |
458 | fh => $state{fh}, |
324 | ($scheme eq "https" ? (tls => "connect") : ()); |
459 | timeout => $timeout, |
|
|
460 | peername => $rhost, |
|
|
461 | tls_ctx => $arg{tls_ctx}; |
325 | |
462 | |
326 | # limit the number of persistent connections |
463 | # limit the number of persistent connections |
|
|
464 | # keepalive not yet supported |
327 | if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { |
465 | if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { |
328 | ++$KA_COUNT{$_[1]}; |
466 | ++$KA_COUNT{$_[1]}; |
329 | $state{handle}{ka_count_guard} = AnyEvent::Util::guard { --$KA_COUNT{$_[1]} }; |
467 | $state{handle}{ka_count_guard} = AnyEvent::Util::guard { |
|
|
468 | --$KA_COUNT{$_[1]} |
|
|
469 | }; |
330 | $hdr{connection} = "keep-alive"; |
470 | $hdr{connection} = "keep-alive"; |
331 | delete $hdr{connection}; # keep-alive not yet supported |
|
|
332 | } else { |
471 | } else { |
333 | delete $hdr{connection}; |
472 | delete $hdr{connection}; |
334 | } |
473 | } |
335 | |
474 | |
336 | # (re-)configure handle |
475 | # (re-)configure handle |
337 | $state{handle}->timeout ($timeout); |
|
|
338 | $state{handle}->on_error (sub { |
476 | $state{handle}->on_error (sub { |
339 | my $errno = "$!"; |
|
|
340 | %state = (); |
477 | %state = (); |
341 | $cb->(undef, { Status => 599, Reason => $errno, URL => $url }); |
478 | $cb->(undef, { Status => 599, Reason => $_[2], URL => $url }); |
342 | }); |
479 | }); |
343 | $state{handle}->on_eof (sub { |
480 | $state{handle}->on_eof (sub { |
344 | %state = (); |
481 | %state = (); |
345 | $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url }); |
482 | $cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", URL => $url }); |
346 | }); |
483 | }); |
347 | |
484 | |
|
|
485 | $state{handle}->starttls ("connect") if $rscheme eq "https"; |
|
|
486 | |
|
|
487 | # handle actual, non-tunneled, request |
|
|
488 | my $handle_actual_request = sub { |
|
|
489 | $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; |
|
|
490 | |
348 | # send request |
491 | # send request |
349 | $state{handle}->push_write ( |
492 | $state{handle}->push_write ( |
350 | "$method $rpath HTTP/1.0\015\012" |
493 | "$method $rpath HTTP/1.0\015\012" |
351 | . (join "", map "$_: $hdr{$_}\015\012", keys %hdr) |
494 | . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) |
352 | . "\015\012" |
495 | . "\015\012" |
353 | . (delete $arg{body}) |
496 | . (delete $arg{body}) |
354 | ); |
|
|
355 | |
|
|
356 | %hdr = (); # reduce memory usage, save a kitten |
|
|
357 | |
|
|
358 | # status line |
|
|
359 | $state{handle}->push_read (line => qr/\015?\012/, sub { |
|
|
360 | $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) \s+ ([^\015\012]+)/ix |
|
|
361 | or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url })); |
|
|
362 | |
|
|
363 | my %hdr = ( # response headers |
|
|
364 | HTTPVersion => "\x00$1", |
|
|
365 | Status => "\x00$2", |
|
|
366 | Reason => "\x00$3", |
|
|
367 | URL => "\x00$url" |
|
|
368 | ); |
497 | ); |
369 | |
498 | |
|
|
499 | # return if error occured during push_write() |
|
|
500 | return unless %state; |
|
|
501 | |
|
|
502 | %hdr = (); # reduce memory usage, save a kitten |
|
|
503 | |
|
|
504 | # status line |
|
|
505 | $state{handle}->push_read (line => $qr_nl, sub { |
|
|
506 | $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix |
|
|
507 | or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response ($_[1])", URL => $url })); |
|
|
508 | |
|
|
509 | my %hdr = ( # response headers |
|
|
510 | HTTPVersion => ",$1", |
|
|
511 | Status => ",$2", |
|
|
512 | Reason => ",$3", |
|
|
513 | URL => ",$url" |
|
|
514 | ); |
|
|
515 | |
370 | # headers, could be optimized a bit |
516 | # headers, could be optimized a bit |
371 | $state{handle}->unshift_read (line => qr/\015?\012\015?\012/, sub { |
517 | $state{handle}->unshift_read (line => $qr_nlnl, sub { |
372 | for ("$_[1]\012") { |
518 | for ("$_[1]") { |
373 | # we support spaces in field names, as lotus domino |
519 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
374 | # creates them. |
520 | |
|
|
521 | # things seen, not parsed: |
|
|
522 | # p3pP="NON CUR OTPi OUR NOR UNI" |
|
|
523 | |
375 | $hdr{lc $1} .= "\x00$2" |
524 | $hdr{lc $1} .= ",$2" |
376 | while /\G |
525 | while /\G |
377 | ([^:\000-\037]+): |
526 | ([^:\000-\037]*): |
378 | [\011\040]* |
527 | [\011\040]* |
379 | ((?: [^\015\012]+ | \015?\012[\011\040] )*) |
528 | ((?: [^\012]+ | \012[\011\040] )*) |
380 | \015?\012 |
529 | \012 |
381 | /gxc; |
530 | /gxc; |
382 | |
531 | |
383 | /\G$/ |
532 | /\G$/ |
384 | or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url })); |
533 | or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", URL => $url })); |
385 | } |
534 | } |
386 | |
535 | |
387 | substr $_, 0, 1, "" |
536 | substr $_, 0, 1, "" |
388 | for values %hdr; |
537 | for values %hdr; |
389 | |
538 | |
390 | my $finish = sub { |
539 | # redirect handling |
391 | %state = (); |
540 | # microsoft and other shitheads don't give a shit for following standards, |
|
|
541 | # try to support some common forms of broken Location headers. |
|
|
542 | if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { |
|
|
543 | $hdr{location} =~ s/^\.\/+//; |
392 | |
544 | |
393 | # set-cookie processing |
545 | my $url = "$rscheme://$uhost:$uport"; |
394 | if ($arg{cookie_jar} && exists $hdr{"set-cookie"}) { |
|
|
395 | for (split /\x00/, $hdr{"set-cookie"}) { |
|
|
396 | my ($cookie, @arg) = split /;\s*/; |
|
|
397 | my ($name, $value) = split /=/, $cookie, 2; |
|
|
398 | my %kv = (value => $value, map { split /=/, $_, 2 } @arg); |
|
|
399 | |
|
|
400 | my $cdom = (delete $kv{domain}) || $uhost; |
|
|
401 | my $cpath = (delete $kv{path}) || "/"; |
|
|
402 | |
|
|
403 | $cdom =~ s/^.?/./; # make sure it starts with a "." |
|
|
404 | |
546 | |
405 | next if $cdom =~ /\.$/; |
547 | unless ($hdr{location} =~ s/^\///) { |
406 | |
548 | $url .= $upath; |
407 | # this is not rfc-like and not netscape-like. go figure. |
549 | $url =~ s/\/[^\/]*$//; |
408 | my $ndots = $cdom =~ y/.//; |
550 | } |
409 | next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2); |
551 | |
410 | |
552 | $hdr{location} = "$url/$hdr{location}"; |
|
|
553 | } |
|
|
554 | |
|
|
555 | my $redirect; |
|
|
556 | |
|
|
557 | if ($recurse) { |
|
|
558 | if ($hdr{Status} =~ /^30[12]$/ && $method ne "POST") { |
|
|
559 | # apparently, mozilla et al. just change POST to GET here |
|
|
560 | # more research is needed before we do the same |
411 | # store it |
561 | $redirect = 1; |
412 | $arg{cookie_jar}{version} = 1; |
562 | } elsif ($hdr{Status} == 303) { |
413 | $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv; |
563 | # even http/1.1 is unclear on how to mutate the method |
|
|
564 | $method = "GET" unless $method eq "HEAD"; |
|
|
565 | $redirect = 1; |
|
|
566 | } elsif ($hdr{Status} == 307 && $method =~ /^(?:GET|HEAD)$/) { |
|
|
567 | $redirect = 1; |
414 | } |
568 | } |
415 | } |
569 | } |
416 | |
570 | |
417 | # microsoft and other assholes don't give a shit for following standards, |
571 | my $finish = sub { |
418 | # try to support a common form of broken Location header. |
572 | $state{handle}->destroy if $state{handle}; |
419 | $_[1]{location} =~ s%^/%$scheme://$uhost:$uport/% |
573 | %state = (); |
|
|
574 | |
|
|
575 | # set-cookie processing |
|
|
576 | if ($arg{cookie_jar}) { |
|
|
577 | for ($_[1]{"set-cookie"}) { |
|
|
578 | # parse NAME=VALUE |
|
|
579 | my @kv; |
|
|
580 | |
|
|
581 | while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) { |
|
|
582 | my $name = $1; |
|
|
583 | my $value = $3; |
|
|
584 | |
|
|
585 | unless ($value) { |
|
|
586 | $value = $2; |
|
|
587 | $value =~ s/\\(.)/$1/gs; |
|
|
588 | } |
|
|
589 | |
|
|
590 | push @kv, $name => $value; |
|
|
591 | |
|
|
592 | last unless /\G\s*;/gc; |
|
|
593 | } |
|
|
594 | |
|
|
595 | last unless @kv; |
|
|
596 | |
|
|
597 | my $name = shift @kv; |
|
|
598 | my %kv = (value => shift @kv, @kv); |
|
|
599 | |
|
|
600 | my $cdom; |
|
|
601 | my $cpath = (delete $kv{path}) || "/"; |
|
|
602 | |
|
|
603 | if (exists $kv{domain}) { |
|
|
604 | $cdom = delete $kv{domain}; |
|
|
605 | |
|
|
606 | $cdom =~ s/^\.?/./; # make sure it starts with a "." |
|
|
607 | |
|
|
608 | next if $cdom =~ /\.$/; |
|
|
609 | |
|
|
610 | # this is not rfc-like and not netscape-like. go figure. |
|
|
611 | my $ndots = $cdom =~ y/.//; |
|
|
612 | next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2); |
|
|
613 | } else { |
|
|
614 | $cdom = $uhost; |
|
|
615 | } |
|
|
616 | |
|
|
617 | # store it |
|
|
618 | $arg{cookie_jar}{version} = 1; |
|
|
619 | $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv; |
|
|
620 | |
|
|
621 | redo if /\G\s*,/gc; |
|
|
622 | } |
|
|
623 | } |
|
|
624 | |
420 | if exists $_[1]{location}; |
625 | if ($redirect && exists $hdr{location}) { |
421 | |
626 | # we ignore any errors, as it is very common to receive |
422 | if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") { |
627 | # Content-Length != 0 but no actual body |
423 | # apparently, mozilla et al. just change POST to GET here |
628 | # we also access %hdr, as $_[1] might be an erro |
424 | # more research is needed before we do the same |
|
|
425 | http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb); |
|
|
426 | } elsif ($_[1]{Status} == 303 && $recurse) { |
|
|
427 | # even http/1.1 is unlear on how to mutate the method |
|
|
428 | $method = "GET" unless $method eq "HEAD"; |
|
|
429 | http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); |
629 | http_request ($method => $hdr{location}, %arg, recurse => $recurse - 1, $cb); |
430 | } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) { |
630 | } else { |
431 | http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); |
631 | $cb->($_[0], $_[1]); |
|
|
632 | } |
|
|
633 | }; |
|
|
634 | |
|
|
635 | my $len = $hdr{"content-length"}; |
|
|
636 | |
|
|
637 | if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { |
|
|
638 | $finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", URL => $url }); |
|
|
639 | } elsif ( |
|
|
640 | $hdr{Status} =~ /^(?:1..|[23]04)$/ |
|
|
641 | or $method eq "HEAD" |
|
|
642 | or (defined $len && !$len) |
|
|
643 | ) { |
|
|
644 | # no body |
|
|
645 | $finish->("", \%hdr); |
432 | } else { |
646 | } else { |
433 | $cb->($_[0], $_[1]); |
647 | # body handling, four different code paths |
|
|
648 | # for want_body_handle, on_body (2x), normal (2x) |
|
|
649 | # we might read too much here, but it does not matter yet (no pers. connections) |
|
|
650 | if (!$redirect && $arg{want_body_handle}) { |
|
|
651 | $_[0]->on_eof (undef); |
|
|
652 | $_[0]->on_error (undef); |
|
|
653 | $_[0]->on_read (undef); |
|
|
654 | |
|
|
655 | $finish->(delete $state{handle}, \%hdr); |
|
|
656 | |
|
|
657 | } elsif ($arg{on_body}) { |
|
|
658 | $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); |
|
|
659 | if ($len) { |
|
|
660 | $_[0]->on_eof (undef); |
|
|
661 | $_[0]->on_read (sub { |
|
|
662 | $len -= length $_[0]{rbuf}; |
|
|
663 | |
|
|
664 | $arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
|
|
665 | or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url }); |
|
|
666 | |
|
|
667 | $len > 0 |
|
|
668 | or $finish->("", \%hdr); |
|
|
669 | }); |
|
|
670 | } else { |
|
|
671 | $_[0]->on_eof (sub { |
|
|
672 | $finish->("", \%hdr); |
|
|
673 | }); |
|
|
674 | $_[0]->on_read (sub { |
|
|
675 | $arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
|
|
676 | or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", URL => $url }); |
|
|
677 | }); |
|
|
678 | } |
|
|
679 | } else { |
|
|
680 | $_[0]->on_eof (undef); |
|
|
681 | |
|
|
682 | if ($len) { |
|
|
683 | $_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }) }); |
|
|
684 | $_[0]->on_read (sub { |
|
|
685 | $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr) |
|
|
686 | if $len <= length $_[0]{rbuf}; |
|
|
687 | }); |
|
|
688 | } else { |
|
|
689 | $_[0]->on_error (sub { |
|
|
690 | $! == Errno::EPIPE || !$! |
|
|
691 | ? $finish->(delete $_[0]{rbuf}, \%hdr) |
|
|
692 | : $finish->(undef, { Status => 599, Reason => $_[2], URL => $url }); |
|
|
693 | }); |
|
|
694 | $_[0]->on_read (sub { }); |
|
|
695 | } |
|
|
696 | } |
434 | } |
697 | } |
435 | }; |
698 | }); |
|
|
699 | }); |
|
|
700 | }; |
436 | |
701 | |
437 | if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") { |
702 | # now handle proxy-CONNECT method |
438 | $finish->(undef, \%hdr); |
703 | if ($proxy && $uscheme eq "https") { |
|
|
704 | # oh dear, we have to wrap it into a connect request |
|
|
705 | |
|
|
706 | # maybe re-use $uauthority with patched port? |
|
|
707 | $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); |
|
|
708 | $state{handle}->push_read (line => $qr_nlnl, sub { |
|
|
709 | $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix |
|
|
710 | or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", URL => $url })); |
|
|
711 | |
|
|
712 | if ($2 == 200) { |
|
|
713 | $rpath = $upath; |
|
|
714 | &$handle_actual_request; |
439 | } else { |
715 | } else { |
440 | if (exists $hdr{"content-length"}) { |
716 | %state = (); |
441 | $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { |
717 | $cb->(undef, { Status => $2, Reason => $3, URL => $url }); |
442 | # could cache persistent connection now |
|
|
443 | if ($hdr{connection} =~ /\bkeep-alive\b/i) { |
|
|
444 | # but we don't, due to misdesigns, this is annoyingly complex |
|
|
445 | }; |
|
|
446 | |
|
|
447 | $finish->($_[1], \%hdr); |
|
|
448 | }); |
|
|
449 | } else { |
|
|
450 | # too bad, need to read until we get an error or EOF, |
|
|
451 | # no way to detect winged data. |
|
|
452 | $_[0]->on_error (sub { |
|
|
453 | $finish->($_[0]{rbuf}, \%hdr); |
|
|
454 | }); |
|
|
455 | $_[0]->on_eof (undef); |
|
|
456 | $_[0]->on_read (sub { }); |
|
|
457 | } |
|
|
458 | } |
718 | } |
459 | }); |
719 | }); |
|
|
720 | } else { |
|
|
721 | &$handle_actual_request; |
460 | }); |
722 | } |
461 | }, sub { |
723 | |
462 | $timeout |
724 | }, $arg{on_prepare} || sub { $timeout }; |
463 | }; |
|
|
464 | }; |
725 | }; |
465 | |
726 | |
466 | defined wantarray && AnyEvent::Util::guard { %state = () } |
727 | defined wantarray && AnyEvent::Util::guard { %state = () } |
467 | } |
728 | } |
468 | |
729 | |
… | |
… | |
489 | =over 4 |
750 | =over 4 |
490 | |
751 | |
491 | =item AnyEvent::HTTP::set_proxy "proxy-url" |
752 | =item AnyEvent::HTTP::set_proxy "proxy-url" |
492 | |
753 | |
493 | Sets the default proxy server to use. The proxy-url must begin with a |
754 | Sets the default proxy server to use. The proxy-url must begin with a |
494 | string of the form C<http://host:port> (optionally C<https:...>). |
755 | string of the form C<http://host:port> (optionally C<https:...>), croaks |
|
|
756 | otherwise. |
|
|
757 | |
|
|
758 | To clear an already-set proxy, use C<undef>. |
495 | |
759 | |
496 | =item $AnyEvent::HTTP::MAX_RECURSE |
760 | =item $AnyEvent::HTTP::MAX_RECURSE |
497 | |
761 | |
498 | The default value for the C<recurse> request parameter (default: C<10>). |
762 | The default value for the C<recurse> request parameter (default: C<10>). |
499 | |
763 | |
500 | =item $AnyEvent::HTTP::USERAGENT |
764 | =item $AnyEvent::HTTP::USERAGENT |
501 | |
765 | |
502 | The default value for the C<User-Agent> header (the default is |
766 | The default value for the C<User-Agent> header (the default is |
503 | C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). |
767 | C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). |
504 | |
768 | |
505 | =item $AnyEvent::HTTP::MAX_PERSISTENT |
769 | =item $AnyEvent::HTTP::MAX_PER_HOST |
506 | |
770 | |
507 | The maximum number of persistent connections to keep open (default: 8). |
771 | The maximum number of concurrent connections to the same host (identified |
|
|
772 | by the hostname). If the limit is exceeded, then the additional requests |
|
|
773 | are queued until previous connections are closed. |
508 | |
774 | |
509 | Not implemented currently. |
775 | The default value for this is C<4>, and it is highly advisable to not |
510 | |
776 | increase it. |
511 | =item $AnyEvent::HTTP::PERSISTENT_TIMEOUT |
|
|
512 | |
|
|
513 | The maximum time to cache a persistent connection, in seconds (default: 2). |
|
|
514 | |
|
|
515 | Not implemented currently. |
|
|
516 | |
777 | |
517 | =item $AnyEvent::HTTP::ACTIVE |
778 | =item $AnyEvent::HTTP::ACTIVE |
518 | |
779 | |
519 | The number of active connections. This is not the number of currently |
780 | The number of active connections. This is not the number of currently |
520 | running requests, but the number of currently open and non-idle TCP |
781 | running requests, but the number of currently open and non-idle TCP |
… | |
… | |
523 | =back |
784 | =back |
524 | |
785 | |
525 | =cut |
786 | =cut |
526 | |
787 | |
527 | sub set_proxy($) { |
788 | sub set_proxy($) { |
|
|
789 | if (length $_[0]) { |
528 | $PROXY = [$2, $3 || 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix; |
790 | $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix |
|
|
791 | or Carp::croak "$_[0]: invalid proxy URL"; |
|
|
792 | $PROXY = [$2, $3 || 3128, $1] |
|
|
793 | } else { |
|
|
794 | undef $PROXY; |
|
|
795 | } |
529 | } |
796 | } |
530 | |
797 | |
531 | # initialise proxy from environment |
798 | # initialise proxy from environment |
|
|
799 | eval { |
532 | set_proxy $ENV{http_proxy}; |
800 | set_proxy $ENV{http_proxy}; |
|
|
801 | }; |
533 | |
802 | |
534 | =head1 SEE ALSO |
803 | =head1 SEE ALSO |
535 | |
804 | |
536 | L<AnyEvent>. |
805 | L<AnyEvent>. |
537 | |
806 | |
538 | =head1 AUTHOR |
807 | =head1 AUTHOR |
539 | |
808 | |
540 | Marc Lehmann <schmorp@schmorp.de> |
809 | Marc Lehmann <schmorp@schmorp.de> |
541 | http://home.schmorp.de/ |
810 | http://home.schmorp.de/ |
542 | |
811 | |
|
|
812 | With many thanks to Дмитрий Шалашов, who provided countless |
|
|
813 | testcases and bugreports. |
|
|
814 | |
543 | =cut |
815 | =cut |
544 | |
816 | |
545 | 1 |
817 | 1 |
546 | |
818 | |