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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 (); |
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49 | use AnyEvent::Handle (); |
48 | use AnyEvent::Handle (); |
50 | |
49 | |
51 | use base Exporter::; |
50 | use base Exporter::; |
52 | |
51 | |
53 | our $VERSION = '1.12'; |
52 | our $VERSION = '1.5'; |
54 | |
53 | |
55 | our @EXPORT = qw(http_get http_post http_head http_request); |
54 | our @EXPORT = qw(http_get http_post http_head http_request); |
56 | |
55 | |
57 | our $USERAGENT = "Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; |
56 | our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; |
58 | our $MAX_RECURSE = 10; |
57 | our $MAX_RECURSE = 10; |
59 | our $MAX_PERSISTENT = 8; |
58 | our $MAX_PERSISTENT = 8; |
60 | our $PERSISTENT_TIMEOUT = 2; |
59 | our $PERSISTENT_TIMEOUT = 2; |
61 | our $TIMEOUT = 300; |
60 | our $TIMEOUT = 300; |
62 | |
61 | |
63 | # changing these is evil |
62 | # changing these is evil |
64 | our $MAX_PERSISTENT_PER_HOST = 2; |
63 | our $MAX_PERSISTENT_PER_HOST = 0; |
65 | our $MAX_PER_HOST = 4; |
64 | our $MAX_PER_HOST = 4; |
66 | |
65 | |
67 | our $PROXY; |
66 | our $PROXY; |
68 | our $ACTIVE = 0; |
67 | our $ACTIVE = 0; |
69 | |
68 | |
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92 | must be an absolute http or https URL. |
91 | must be an absolute http or https URL. |
93 | |
92 | |
94 | When called in void context, nothing is returned. In other contexts, |
93 | When called in void context, nothing is returned. In other contexts, |
95 | C<http_request> returns a "cancellation guard" - you have to keep the |
94 | C<http_request> returns a "cancellation guard" - you have to keep the |
96 | object at least alive until the callback get called. If the object gets |
95 | object at least alive until the callback get called. If the object gets |
97 | destroyed before the callbakc is called, the request will be cancelled. |
96 | destroyed before the callback is called, the request will be cancelled. |
98 | |
97 | |
99 | The callback will be called with the response data as first argument |
98 | The callback will be called with the response body data as first argument |
100 | (or C<undef> if it wasn't available due to errors), and a hash-ref with |
99 | (or C<undef> if an error occured), and a hash-ref with response headers as |
101 | response headers as second argument. |
100 | second argument. |
102 | |
101 | |
103 | All the headers in that hash are lowercased. In addition to the response |
102 | All the headers in that hash are lowercased. In addition to the response |
104 | headers, the "pseudo-headers" C<HTTPVersion>, C<Status> and C<Reason> |
103 | headers, the "pseudo-headers" (uppercase to avoid clashing with possible |
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104 | response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the |
105 | contain the three parts of the HTTP Status-Line of the same name. The |
105 | three parts of the HTTP Status-Line of the same name. If an error occurs |
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106 | during the body phase of a request, then the original C<Status> and |
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107 | C<Reason> values from the header are available as C<OrigStatus> and |
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108 | C<OrigReason>. |
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109 | |
106 | pseudo-header C<URL> contains the original URL (which can differ from the |
110 | The pseudo-header C<URL> contains the actual URL (which can differ from |
107 | requested URL when following redirects). |
111 | the requested URL when following redirects - for example, you might get |
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112 | an error that your URL scheme is not supported even though your URL is a |
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113 | valid http URL because it redirected to an ftp URL, in which case you can |
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114 | look at the URL pseudo header). |
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115 | |
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116 | The pseudo-header C<Redirect> only exists when the request was a result |
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117 | of an internal redirect. In that case it is an array reference with |
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118 | the C<($data, $headers)> from the redirect response. Note that this |
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119 | response could in turn be the result of a redirect itself, and C<< |
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120 | $headers->{Redirect}[1]{Redirect} >> will then contain the original |
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121 | response, and so on. |
108 | |
122 | |
109 | If the server sends a header multiple times, then their contents will be |
123 | If the server sends a header multiple times, then their contents will be |
110 | joined together with a comma (C<,>), as per the HTTP spec. |
124 | joined together with a comma (C<,>), as per the HTTP spec. |
111 | |
125 | |
112 | If an internal error occurs, such as not being able to resolve a hostname, |
126 | If an internal error occurs, such as not being able to resolve a hostname, |
113 | then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<599> |
127 | then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x> |
114 | and the C<Reason> pseudo-header will contain an error message. |
128 | (usually C<599>) and the C<Reason> pseudo-header will contain an error |
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129 | message. |
115 | |
130 | |
116 | A typical callback might look like this: |
131 | A typical callback might look like this: |
117 | |
132 | |
118 | sub { |
133 | sub { |
119 | my ($body, $hdr) = @_; |
134 | my ($body, $hdr) = @_; |
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137 | |
152 | |
138 | =item headers => hashref |
153 | =item headers => hashref |
139 | |
154 | |
140 | The request headers to use. Currently, C<http_request> may provide its |
155 | The request headers to use. Currently, C<http_request> may provide its |
141 | own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers |
156 | own C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers |
142 | and will provide defaults for C<User-Agent:> and C<Referer:>. |
157 | and will provide defaults for C<User-Agent:> and C<Referer:> (this can be |
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158 | suppressed by using C<undef> for these headers in which case they won't be |
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159 | sent at all). |
143 | |
160 | |
144 | =item timeout => $seconds |
161 | =item timeout => $seconds |
145 | |
162 | |
146 | The time-out to use for various stages - each connect attempt will reset |
163 | The time-out to use for various stages - each connect attempt will reset |
147 | the timeout, as will read or write activity. Default timeout is 5 minutes. |
164 | the timeout, as will read or write activity, i.e. this is not an overall |
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165 | timeout. |
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166 | |
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167 | Default timeout is 5 minutes. |
148 | |
168 | |
149 | =item proxy => [$host, $port[, $scheme]] or undef |
169 | =item proxy => [$host, $port[, $scheme]] or undef |
150 | |
170 | |
151 | Use the given http proxy for all requests. If not specified, then the |
171 | Use the given http proxy for all requests. If not specified, then the |
152 | default proxy (as specified by C<$ENV{http_proxy}>) is used. |
172 | default proxy (as specified by C<$ENV{http_proxy}>) is used. |
153 | |
173 | |
154 | C<$scheme> must be either missing or C<http> for HTTP, or C<https> for |
174 | C<$scheme> must be either missing, C<http> for HTTP or C<https> for |
155 | HTTPS. |
175 | HTTPS. |
156 | |
176 | |
157 | =item body => $string |
177 | =item body => $string |
158 | |
178 | |
159 | The request body, usually empty. Will be-sent as-is (future versions of |
179 | The request body, usually empty. Will be-sent as-is (future versions of |
… | |
… | |
165 | based on the original netscape specification. |
185 | based on the original netscape specification. |
166 | |
186 | |
167 | The C<$hash_ref> must be an (initially empty) hash reference which will |
187 | The C<$hash_ref> must be an (initially empty) hash reference which will |
168 | get updated automatically. It is possible to save the cookie_jar to |
188 | get updated automatically. It is possible to save the cookie_jar to |
169 | persistent storage with something like JSON or Storable, but this is not |
189 | persistent storage with something like JSON or Storable, but this is not |
170 | recommended, as expire times are currently being ignored. |
190 | recommended, as expiry times are currently being ignored. |
171 | |
191 | |
172 | Note that this cookie implementation is not of very high quality, nor |
192 | Note that this cookie implementation is not of very high quality, nor |
173 | meant to be complete. If you want complete cookie management you have to |
193 | meant to be complete. If you want complete cookie management you have to |
174 | do that on your own. C<cookie_jar> is meant as a quick fix to get some |
194 | do that on your own. C<cookie_jar> is meant as a quick fix to get some |
175 | cookie-using sites working. Cookies are a privacy disaster, do not use |
195 | cookie-using sites working. Cookies are a privacy disaster, do not use |
176 | them unless required to. |
196 | them unless required to. |
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197 | |
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198 | =item tls_ctx => $scheme | $tls_ctx |
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199 | |
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200 | Specifies the AnyEvent::TLS context to be used for https connections. This |
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201 | parameter follows the same rules as the C<tls_ctx> parameter to |
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202 | L<AnyEvent::Handle>, but additionally, the two strings C<low> or |
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203 | C<high> can be specified, which give you a predefined low-security (no |
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204 | verification, highest compatibility) and high-security (CA and common-name |
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205 | verification) TLS context. |
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206 | |
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207 | The default for this option is C<low>, which could be interpreted as "give |
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208 | me the page, no matter what". |
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209 | |
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210 | =item on_prepare => $callback->($fh) |
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211 | |
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212 | In rare cases you need to "tune" the socket before it is used to |
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213 | connect (for exmaple, to bind it on a given IP address). This parameter |
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214 | overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect> |
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215 | and behaves exactly the same way (e.g. it has to provide a |
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216 | timeout). See the description for the C<$prepare_cb> argument of |
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217 | C<AnyEvent::Socket::tcp_connect> for details. |
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218 | |
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219 | =item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb) |
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220 | |
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221 | In even rarer cases you want total control over how AnyEvent::HTTP |
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222 | establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect> |
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223 | to do this, but you can provide your own C<tcp_connect> function - |
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224 | obviously, it has to follow the same calling conventions, except that it |
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225 | may always return a connection guard object. |
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226 | |
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227 | There are probably lots of weird uses for this function, starting from |
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228 | tracing the hosts C<http_request> actually tries to connect, to (inexact |
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229 | but fast) host => IP address caching or even socks protocol support. |
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230 | |
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231 | =item on_header => $callback->($headers) |
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232 | |
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233 | When specified, this callback will be called with the header hash as soon |
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234 | as headers have been successfully received from the remote server (not on |
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235 | locally-generated errors). |
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236 | |
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237 | It has to return either true (in which case AnyEvent::HTTP will continue), |
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238 | or false, in which case AnyEvent::HTTP will cancel the download (and call |
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239 | the finish callback with an error code of C<598>). |
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240 | |
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241 | This callback is useful, among other things, to quickly reject unwanted |
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242 | content, which, if it is supposed to be rare, can be faster than first |
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243 | doing a C<HEAD> request. |
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244 | |
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245 | Example: cancel the request unless the content-type is "text/html". |
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246 | |
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247 | on_header => sub { |
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248 | $_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/ |
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249 | }, |
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250 | |
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251 | =item on_body => $callback->($partial_body, $headers) |
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252 | |
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253 | When specified, all body data will be passed to this callback instead of |
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254 | to the completion callback. The completion callback will get the empty |
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255 | string instead of the body data. |
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256 | |
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257 | It has to return either true (in which case AnyEvent::HTTP will continue), |
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258 | or false, in which case AnyEvent::HTTP will cancel the download (and call |
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259 | the completion callback with an error code of C<598>). |
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260 | |
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261 | This callback is useful when the data is too large to be held in memory |
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262 | (so the callback writes it to a file) or when only some information should |
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263 | be extracted, or when the body should be processed incrementally. |
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264 | |
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265 | It is usually preferred over doing your own body handling via |
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266 | C<want_body_handle>, but in case of streaming APIs, where HTTP is |
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267 | only used to create a connection, C<want_body_handle> is the better |
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268 | alternative, as it allows you to install your own event handler, reducing |
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269 | resource usage. |
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270 | |
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271 | =item want_body_handle => $enable |
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272 | |
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273 | When enabled (default is disabled), the behaviour of AnyEvent::HTTP |
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274 | changes considerably: after parsing the headers, and instead of |
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275 | downloading the body (if any), the completion callback will be |
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276 | called. Instead of the C<$body> argument containing the body data, the |
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277 | callback will receive the L<AnyEvent::Handle> object associated with the |
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278 | connection. In error cases, C<undef> will be passed. When there is no body |
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279 | (e.g. status C<304>), the empty string will be passed. |
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280 | |
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281 | The handle object might or might not be in TLS mode, might be connected to |
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282 | a proxy, be a persistent connection etc., and configured in unspecified |
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283 | ways. The user is responsible for this handle (it will not be used by this |
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284 | module anymore). |
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285 | |
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286 | This is useful with some push-type services, where, after the initial |
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287 | headers, an interactive protocol is used (typical example would be the |
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288 | push-style twitter API which starts a JSON/XML stream). |
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289 | |
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290 | If you think you need this, first have a look at C<on_body>, to see if |
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291 | that doesn't solve your problem in a better way. |
177 | |
292 | |
178 | =back |
293 | =back |
179 | |
294 | |
180 | Example: make a simple HTTP GET request for http://www.nethype.de/ |
295 | Example: make a simple HTTP GET request for http://www.nethype.de/ |
181 | |
296 | |
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237 | push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; |
352 | push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; |
238 | |
353 | |
239 | _slot_schedule $_[0]; |
354 | _slot_schedule $_[0]; |
240 | } |
355 | } |
241 | |
356 | |
242 | our $qr_nl = qr<\015?\012>; |
357 | # continue to parse $_ for headers and place them into the arg |
243 | our $qr_nlnl = qr<\015?\012\015?\012>; |
358 | sub parse_hdr() { |
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359 | my %hdr; |
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360 | |
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361 | # things seen, not parsed: |
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362 | # p3pP="NON CUR OTPi OUR NOR UNI" |
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363 | |
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364 | $hdr{lc $1} .= ",$2" |
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365 | while /\G |
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366 | ([^:\000-\037]*): |
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367 | [\011\040]* |
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368 | ((?: [^\012]+ | \012[\011\040] )*) |
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369 | \012 |
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370 | /gxc; |
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371 | |
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372 | /\G$/ |
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373 | or return; |
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374 | |
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375 | # remove the "," prefix we added to all headers above |
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376 | substr $_, 0, 1, "" |
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377 | for values %hdr; |
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378 | |
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379 | \%hdr |
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380 | } |
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381 | |
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382 | our $qr_nlnl = qr{(?<![^\012])\015?\012}; |
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383 | |
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384 | our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; |
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385 | our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; |
244 | |
386 | |
245 | sub http_request($$@) { |
387 | sub http_request($$@) { |
246 | my $cb = pop; |
388 | my $cb = pop; |
247 | my ($method, $url, %arg) = @_; |
389 | my ($method, $url, %arg) = @_; |
248 | |
390 | |
249 | my %hdr; |
391 | my %hdr; |
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392 | |
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393 | $arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" || !exists $arg{tls_ctx}; |
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394 | $arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high"; |
250 | |
395 | |
251 | $method = uc $method; |
396 | $method = uc $method; |
252 | |
397 | |
253 | if (my $hdr = $arg{headers}) { |
398 | if (my $hdr = $arg{headers}) { |
254 | while (my ($k, $v) = each %$hdr) { |
399 | while (my ($k, $v) = each %$hdr) { |
255 | $hdr{lc $k} = $v; |
400 | $hdr{lc $k} = $v; |
256 | } |
401 | } |
257 | } |
402 | } |
258 | |
403 | |
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404 | # pseudo headers for all subsequent responses |
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405 | my @pseudo = (URL => $url); |
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406 | push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect}; |
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407 | |
259 | my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; |
408 | my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; |
260 | |
409 | |
261 | return $cb->(undef, { Status => 599, Reason => "recursion limit reached", URL => $url }) |
410 | return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" }) |
262 | if $recurse < 0; |
411 | if $recurse < 0; |
263 | |
412 | |
264 | my $proxy = $arg{proxy} || $PROXY; |
413 | my $proxy = $arg{proxy} || $PROXY; |
265 | my $timeout = $arg{timeout} || $TIMEOUT; |
414 | my $timeout = $arg{timeout} || $TIMEOUT; |
266 | |
415 | |
267 | $hdr{"user-agent"} ||= $USERAGENT; |
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268 | |
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269 | my ($uscheme, $uauthority, $upath, $query, $fragment) = |
416 | my ($uscheme, $uauthority, $upath, $query, $fragment) = |
270 | $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:\?([^#]*))?(?:#(.*))?|; |
417 | $url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|; |
271 | |
418 | |
272 | $uscheme = lc $uscheme; |
419 | $uscheme = lc $uscheme; |
273 | |
420 | |
274 | my $uport = $uscheme eq "http" ? 80 |
421 | my $uport = $uscheme eq "http" ? 80 |
275 | : $uscheme eq "https" ? 443 |
422 | : $uscheme eq "https" ? 443 |
276 | : return $cb->(undef, { Status => 599, Reason => "only http and https URL schemes supported", URL => $url }); |
423 | : return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" }); |
277 | |
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278 | $hdr{referer} ||= "$uscheme://$uauthority$upath"; # leave out fragment and query string, just a heuristic |
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279 | |
424 | |
280 | $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x |
425 | $uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x |
281 | or return $cb->(undef, { Status => 599, Reason => "unparsable URL", URL => $url }); |
426 | or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" }); |
282 | |
427 | |
283 | my $uhost = $1; |
428 | my $uhost = $1; |
284 | $uport = $2 if defined $2; |
429 | $uport = $2 if defined $2; |
285 | |
430 | |
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431 | $hdr{host} = defined $2 ? "$uhost:$2" : "$uhost" |
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432 | unless exists $hdr{host}; |
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433 | |
286 | $uhost =~ s/^\[(.*)\]$/$1/; |
434 | $uhost =~ s/^\[(.*)\]$/$1/; |
287 | $upath .= "?$query" if length $query; |
435 | $upath .= $query if length $query; |
288 | |
436 | |
289 | $upath =~ s%^/?%/%; |
437 | $upath =~ s%^/?%/%; |
290 | |
438 | |
291 | # cookie processing |
439 | # cookie processing |
292 | if (my $jar = $arg{cookie_jar}) { |
440 | if (my $jar = $arg{cookie_jar}) { |
… | |
… | |
322 | my ($rhost, $rport, $rscheme, $rpath); # request host, port, path |
470 | my ($rhost, $rport, $rscheme, $rpath); # request host, port, path |
323 | |
471 | |
324 | if ($proxy) { |
472 | if ($proxy) { |
325 | ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy); |
473 | ($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy); |
326 | |
474 | |
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475 | $rscheme = "http" unless defined $rscheme; |
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476 | |
327 | # don't support https requests over https-proxy transport, |
477 | # don't support https requests over https-proxy transport, |
328 | # can't be done with tls as spec'ed, unless you double-encrypt. |
478 | # can't be done with tls as spec'ed, unless you double-encrypt. |
329 | $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; |
479 | $rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; |
330 | } else { |
480 | } else { |
331 | ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); |
481 | ($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); |
332 | } |
482 | } |
333 | |
483 | |
334 | $hdr{host} = $uhost; |
484 | # leave out fragment and query string, just a heuristic |
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485 | $hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer}; |
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486 | $hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"}; |
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487 | |
335 | $hdr{"content-length"} = length $arg{body}; |
488 | $hdr{"content-length"} = length $arg{body} |
|
|
489 | if length $arg{body} || $method ne "GET"; |
|
|
490 | |
|
|
491 | $hdr{connection} = "close TE"; |
|
|
492 | $hdr{te} = "trailers" unless exists $hdr{te}; |
336 | |
493 | |
337 | my %state = (connect_guard => 1); |
494 | my %state = (connect_guard => 1); |
338 | |
495 | |
339 | _get_slot $uhost, sub { |
496 | _get_slot $uhost, sub { |
340 | $state{slot_guard} = shift; |
497 | $state{slot_guard} = shift; |
341 | |
498 | |
342 | return unless $state{connect_guard}; |
499 | return unless $state{connect_guard}; |
343 | |
500 | |
344 | $state{connect_guard} = AnyEvent::Socket::tcp_connect $rhost, $rport, sub { |
501 | my $connect_cb = sub { |
345 | $state{fh} = shift |
502 | $state{fh} = shift |
|
|
503 | or do { |
|
|
504 | my $err = "$!"; |
|
|
505 | %state = (); |
346 | or return $cb->(undef, { Status => 599, Reason => "$!", URL => $url }); |
506 | return $cb->(undef, { @pseudo, Status => 599, Reason => $err }); |
|
|
507 | }; |
|
|
508 | |
347 | pop; # free memory, save a tree |
509 | pop; # free memory, save a tree |
348 | |
510 | |
349 | return unless delete $state{connect_guard}; |
511 | return unless delete $state{connect_guard}; |
350 | |
512 | |
351 | # get handle |
513 | # get handle |
352 | $state{handle} = new AnyEvent::Handle |
514 | $state{handle} = new AnyEvent::Handle |
353 | fh => $state{fh}, |
515 | fh => $state{fh}, |
|
|
516 | peername => $rhost, |
|
|
517 | tls_ctx => $arg{tls_ctx}, |
|
|
518 | # these need to be reconfigured on keepalive handles |
354 | timeout => $timeout; |
519 | timeout => $timeout, |
|
|
520 | on_error => sub { |
|
|
521 | %state = (); |
|
|
522 | $cb->(undef, { @pseudo, Status => 599, Reason => $_[2] }); |
|
|
523 | }, |
|
|
524 | on_eof => sub { |
|
|
525 | %state = (); |
|
|
526 | $cb->(undef, { @pseudo, Status => 599, Reason => "Unexpected end-of-file" }); |
|
|
527 | }, |
|
|
528 | ; |
355 | |
529 | |
356 | # limit the number of persistent connections |
530 | # limit the number of persistent connections |
357 | # keepalive not yet supported |
531 | # keepalive not yet supported |
358 | if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { |
532 | # if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { |
359 | ++$KA_COUNT{$_[1]}; |
533 | # ++$KA_COUNT{$_[1]}; |
360 | $state{handle}{ka_count_guard} = AnyEvent::Util::guard { |
534 | # $state{handle}{ka_count_guard} = AnyEvent::Util::guard { |
361 | --$KA_COUNT{$_[1]} |
535 | # --$KA_COUNT{$_[1]} |
362 | }; |
536 | # }; |
363 | $hdr{connection} = "keep-alive"; |
537 | # $hdr{connection} = "keep-alive"; |
364 | } else { |
538 | # } else { |
365 | delete $hdr{connection}; |
539 | # delete $hdr{connection}; |
366 | } |
540 | # } |
367 | |
|
|
368 | # (re-)configure handle |
|
|
369 | $state{handle}->on_error (sub { |
|
|
370 | my $errno = "$!"; |
|
|
371 | %state = (); |
|
|
372 | $cb->(undef, { Status => 599, Reason => $errno, URL => $url }); |
|
|
373 | }); |
|
|
374 | $state{handle}->on_eof (sub { |
|
|
375 | %state = (); |
|
|
376 | $cb->(undef, { Status => 599, Reason => "unexpected end-of-file", URL => $url }); |
|
|
377 | }); |
|
|
378 | |
541 | |
379 | $state{handle}->starttls ("connect") if $rscheme eq "https"; |
542 | $state{handle}->starttls ("connect") if $rscheme eq "https"; |
380 | |
543 | |
381 | # handle actual, non-tunneled, request |
544 | # handle actual, non-tunneled, request |
382 | my $handle_actual_request = sub { |
545 | my $handle_actual_request = sub { |
383 | $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; |
546 | $state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; |
384 | |
547 | |
385 | # send request |
548 | # send request |
386 | $state{handle}->push_write ( |
549 | $state{handle}->push_write ( |
387 | "$method $rpath HTTP/1.0\015\012" |
550 | "$method $rpath HTTP/1.1\015\012" |
388 | . (join "", map "\u$_: $hdr{$_}\015\012", keys %hdr) |
551 | . (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) |
389 | . "\015\012" |
552 | . "\015\012" |
390 | . (delete $arg{body}) |
553 | . (delete $arg{body}) |
391 | ); |
554 | ); |
392 | |
555 | |
|
|
556 | # return if error occured during push_write() |
|
|
557 | return unless %state; |
|
|
558 | |
393 | %hdr = (); # reduce memory usage, save a kitten |
559 | %hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use |
394 | |
560 | |
395 | # status line |
561 | # status line and headers |
396 | $state{handle}->push_read (line => $qr_nl, sub { |
562 | $state{handle}->push_read (line => $qr_nlnl, sub { |
397 | $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix |
563 | my $keepalive = pop; |
398 | or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid server response ($_[1])", URL => $url })); |
|
|
399 | |
564 | |
400 | my %hdr = ( # response headers |
|
|
401 | HTTPVersion => ",$1", |
|
|
402 | Status => ",$2", |
|
|
403 | Reason => ",$3", |
|
|
404 | URL => ",$url" |
|
|
405 | ); |
|
|
406 | |
|
|
407 | # headers, could be optimized a bit |
|
|
408 | $state{handle}->unshift_read (line => $qr_nlnl, sub { |
|
|
409 | for ("$_[1]\012") { |
565 | for ("$_[1]") { |
410 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
566 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
411 | |
567 | |
412 | # we support spaces in field names, as lotus domino |
568 | /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/igxc |
413 | # creates them (actually spaces around seperators |
569 | or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid server response" })); |
414 | # are strictly allowed in http, they are a security issue). |
|
|
415 | $hdr{lc $1} .= ",$2" |
|
|
416 | while /\G |
|
|
417 | ([^:\000-\037]+): |
|
|
418 | [\011\040]* |
|
|
419 | ((?: [^\012]+ | \012[\011\040] )*) |
|
|
420 | \012 |
|
|
421 | /gxc; |
|
|
422 | |
570 | |
|
|
571 | push @pseudo, |
|
|
572 | HTTPVersion => $1, |
|
|
573 | Status => $2, |
|
|
574 | Reason => $3, |
423 | /\G$/ |
575 | ; |
|
|
576 | |
|
|
577 | my $hdr = parse_hdr |
424 | or return (%state = (), $cb->(undef, { Status => 599, Reason => "garbled response headers", URL => $url })); |
578 | or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Garbled response headers" })); |
|
|
579 | |
|
|
580 | %hdr = (%$hdr, @pseudo); |
|
|
581 | } |
|
|
582 | |
|
|
583 | # redirect handling |
|
|
584 | # microsoft and other shitheads don't give a shit for following standards, |
|
|
585 | # try to support some common forms of broken Location headers. |
|
|
586 | if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { |
|
|
587 | $hdr{location} =~ s/^\.\/+//; |
|
|
588 | |
|
|
589 | my $url = "$rscheme://$uhost:$uport"; |
|
|
590 | |
|
|
591 | unless ($hdr{location} =~ s/^\///) { |
|
|
592 | $url .= $upath; |
|
|
593 | $url =~ s/\/[^\/]*$//; |
425 | } |
594 | } |
426 | |
595 | |
427 | substr $_, 0, 1, "" |
596 | $hdr{location} = "$url/$hdr{location}"; |
428 | for values %hdr; |
597 | } |
429 | |
598 | |
430 | my $finish = sub { |
599 | my $redirect; |
|
|
600 | |
|
|
601 | if ($recurse) { |
|
|
602 | my $status = $hdr{Status}; |
|
|
603 | |
|
|
604 | # industry standard is to redirect POST as GET for |
|
|
605 | # 301, 302 and 303, in contrast to http/1.0 and 1.1. |
|
|
606 | # also, the UA should ask the user for 301 and 307 and POST, |
|
|
607 | # industry standard seems to be to simply follow. |
|
|
608 | # we go with the industry standard. |
|
|
609 | if ($status == 301 or $status == 302 or $status == 303) { |
|
|
610 | # HTTP/1.1 is unclear on how to mutate the method |
|
|
611 | $method = "GET" unless $method eq "HEAD"; |
|
|
612 | $redirect = 1; |
|
|
613 | } elsif ($status == 307) { |
|
|
614 | $redirect = 1; |
|
|
615 | } |
|
|
616 | } |
|
|
617 | |
|
|
618 | my $finish = sub { # ($data, $err_status, $err_reason[, $keepalive]) |
431 | $state{handle}->destroy; |
619 | $state{handle}->destroy if $state{handle}; |
432 | %state = (); |
620 | %state = (); |
433 | |
621 | |
|
|
622 | if (defined $_[1]) { |
|
|
623 | $hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1]; |
|
|
624 | $hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2]; |
|
|
625 | } |
|
|
626 | |
434 | # set-cookie processing |
627 | # set-cookie processing |
435 | if ($arg{cookie_jar}) { |
628 | if ($arg{cookie_jar}) { |
436 | for ($hdr{"set-cookie"}) { |
629 | for ($hdr{"set-cookie"}) { |
437 | # parse NAME=VALUE |
630 | # parse NAME=VALUE |
438 | my @kv; |
631 | my @kv; |
439 | |
632 | |
440 | while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) { |
633 | while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) { |
441 | my $name = $1; |
634 | my $name = $1; |
442 | my $value = $3; |
635 | my $value = $3; |
443 | |
636 | |
444 | unless ($value) { |
637 | unless ($value) { |
445 | $value = $2; |
638 | $value = $2; |
446 | $value =~ s/\\(.)/$1/gs; |
639 | $value =~ s/\\(.)/$1/gs; |
|
|
640 | } |
|
|
641 | |
|
|
642 | push @kv, $name => $value; |
|
|
643 | |
|
|
644 | last unless /\G\s*;/gc; |
|
|
645 | } |
|
|
646 | |
|
|
647 | last unless @kv; |
|
|
648 | |
|
|
649 | my $name = shift @kv; |
|
|
650 | my %kv = (value => shift @kv, @kv); |
|
|
651 | |
|
|
652 | my $cdom; |
|
|
653 | my $cpath = (delete $kv{path}) || "/"; |
|
|
654 | |
|
|
655 | if (exists $kv{domain}) { |
|
|
656 | $cdom = delete $kv{domain}; |
|
|
657 | |
|
|
658 | $cdom =~ s/^\.?/./; # make sure it starts with a "." |
|
|
659 | |
|
|
660 | next if $cdom =~ /\.$/; |
|
|
661 | |
|
|
662 | # this is not rfc-like and not netscape-like. go figure. |
|
|
663 | my $ndots = $cdom =~ y/.//; |
|
|
664 | next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2); |
|
|
665 | } else { |
|
|
666 | $cdom = $uhost; |
|
|
667 | } |
|
|
668 | |
|
|
669 | # store it |
|
|
670 | $arg{cookie_jar}{version} = 1; |
|
|
671 | $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv; |
|
|
672 | |
|
|
673 | redo if /\G\s*,/gc; |
|
|
674 | } |
|
|
675 | } |
|
|
676 | |
|
|
677 | if ($redirect && exists $hdr{location}) { |
|
|
678 | # we ignore any errors, as it is very common to receive |
|
|
679 | # Content-Length != 0 but no actual body |
|
|
680 | # we also access %hdr, as $_[1] might be an erro |
|
|
681 | http_request ( |
|
|
682 | $method => $hdr{location}, |
|
|
683 | %arg, |
|
|
684 | recurse => $recurse - 1, |
|
|
685 | Redirect => [$_[0], \%hdr], |
|
|
686 | $cb); |
|
|
687 | } else { |
|
|
688 | $cb->($_[0], \%hdr); |
|
|
689 | } |
|
|
690 | }; |
|
|
691 | |
|
|
692 | my $len = $hdr{"content-length"}; |
|
|
693 | |
|
|
694 | if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { |
|
|
695 | $finish->(undef, 598 => "Request cancelled by on_header"); |
|
|
696 | } elsif ( |
|
|
697 | $hdr{Status} =~ /^(?:1..|204|205|304)$/ |
|
|
698 | or $method eq "HEAD" |
|
|
699 | or (defined $len && !$len) |
|
|
700 | ) { |
|
|
701 | # no body |
|
|
702 | $finish->("", undef, undef, 1); |
|
|
703 | } else { |
|
|
704 | # body handling, many different code paths |
|
|
705 | # - no body expected |
|
|
706 | # - want_body_handle |
|
|
707 | # - te chunked |
|
|
708 | # - 2x length known (with or without on_body) |
|
|
709 | # - 2x length not known (with or without on_body) |
|
|
710 | if (!$redirect && $arg{want_body_handle}) { |
|
|
711 | $_[0]->on_eof (undef); |
|
|
712 | $_[0]->on_error (undef); |
|
|
713 | $_[0]->on_read (undef); |
|
|
714 | |
|
|
715 | $finish->(delete $state{handle}); |
|
|
716 | |
|
|
717 | } elsif ($hdr{"transfer-encoding"} =~ /chunked/) { |
|
|
718 | my $body = undef; |
|
|
719 | my $on_body = $arg{on_body} || sub { $body .= shift; 1 }; |
|
|
720 | |
|
|
721 | $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) }); |
|
|
722 | |
|
|
723 | my $read_chunk; $read_chunk = sub { |
|
|
724 | warn $_[1];#d# |
|
|
725 | $_[1] =~ /^([0-9a-fA-F]+)/ |
|
|
726 | or $finish->(undef, 599 => "Garbled chunked transfer encoding"); |
|
|
727 | |
|
|
728 | my $len = hex $1; |
|
|
729 | |
|
|
730 | if ($len) { |
|
|
731 | $_[0]->push_read (chunk => hex $1, sub { |
|
|
732 | $on_body->($_[1], \%hdr) |
|
|
733 | or return $finish->(undef, 598 => "Request cancelled by on_body"); |
|
|
734 | |
|
|
735 | $_[0]->push_read (line => sub { |
|
|
736 | length $_[1] |
|
|
737 | and return $finish->(undef, 599 => "Garbled chunked transfer encoding"); |
|
|
738 | $_[0]->push_read (line => $read_chunk); |
|
|
739 | }); |
|
|
740 | }); |
|
|
741 | } else { |
|
|
742 | $_[0]->push_read (line => $qr_nlnl, sub { |
|
|
743 | if (length $_[1]) { |
|
|
744 | for ("$_[1]") { |
|
|
745 | y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
|
|
746 | |
|
|
747 | my $hdr = parse_hdr |
|
|
748 | or return $finish->(undef, 599 => "Garbled response trailers"); |
|
|
749 | |
|
|
750 | %hdr = (%hdr, %$hdr); |
|
|
751 | } |
447 | } |
752 | } |
448 | |
753 | |
449 | push @kv, $name => $value; |
754 | $finish->($body, undef, undef, 1); |
450 | |
|
|
451 | last unless /\G\s*;/gc; |
|
|
452 | } |
755 | }); |
453 | |
|
|
454 | last unless @kv; |
|
|
455 | |
|
|
456 | my $name = shift @kv; |
|
|
457 | my %kv = (value => shift @kv, @kv); |
|
|
458 | |
|
|
459 | my $cdom; |
|
|
460 | my $cpath = (delete $kv{path}) || "/"; |
|
|
461 | |
|
|
462 | if (exists $kv{domain}) { |
|
|
463 | $cdom = delete $kv{domain}; |
|
|
464 | |
|
|
465 | $cdom =~ s/^\.?/./; # make sure it starts with a "." |
|
|
466 | |
|
|
467 | next if $cdom =~ /\.$/; |
|
|
468 | |
|
|
469 | # this is not rfc-like and not netscape-like. go figure. |
|
|
470 | my $ndots = $cdom =~ y/.//; |
|
|
471 | next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2); |
|
|
472 | } else { |
|
|
473 | $cdom = $uhost; |
|
|
474 | } |
|
|
475 | |
|
|
476 | # store it |
|
|
477 | $arg{cookie_jar}{version} = 1; |
|
|
478 | $arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv; |
|
|
479 | |
|
|
480 | redo if /\G\s*,/gc; |
|
|
481 | } |
756 | } |
482 | } |
757 | }; |
483 | |
758 | |
484 | # microsoft and other shitheads don't give a shit for following standards, |
759 | $_[0]->push_read (line => $read_chunk); |
485 | # try to support some common forms of broken Location headers. |
|
|
486 | if ($_[1]{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { |
|
|
487 | $_[1]{location} =~ s/^\.\/+//; |
|
|
488 | |
760 | |
489 | my $url = "$rscheme://$uhost:$uport"; |
761 | } elsif ($arg{on_body}) { |
|
|
762 | $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) }); |
490 | |
763 | |
491 | unless ($_[1]{location} =~ s/^\///) { |
|
|
492 | $url .= $upath; |
|
|
493 | $url =~ s/\/[^\/]*$//; |
|
|
494 | } |
|
|
495 | |
|
|
496 | $_[1]{location} = "$url/$_[1]{location}"; |
|
|
497 | } |
|
|
498 | |
|
|
499 | if ($_[1]{Status} =~ /^30[12]$/ && $recurse && $method ne "POST") { |
|
|
500 | # apparently, mozilla et al. just change POST to GET here |
|
|
501 | # more research is needed before we do the same |
|
|
502 | http_request ($method, $_[1]{location}, %arg, recurse => $recurse - 1, $cb); |
|
|
503 | } elsif ($_[1]{Status} == 303 && $recurse) { |
|
|
504 | # even http/1.1 is unclear on how to mutate the method |
|
|
505 | $method = "GET" unless $method eq "HEAD"; |
|
|
506 | http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); |
|
|
507 | } elsif ($_[1]{Status} == 307 && $recurse && $method =~ /^(?:GET|HEAD)$/) { |
|
|
508 | http_request ($method => $_[1]{location}, %arg, recurse => $recurse - 1, $cb); |
|
|
509 | } else { |
764 | if ($len) { |
510 | $cb->($_[0], $_[1]); |
765 | $_[0]->on_read (sub { |
511 | } |
766 | $len -= length $_[0]{rbuf}; |
512 | }; |
|
|
513 | |
767 | |
514 | if ($hdr{Status} =~ /^(?:1..|204|304)$/ or $method eq "HEAD") { |
768 | $arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
515 | $finish->(undef, \%hdr); |
769 | or return $finish->(undef, 598 => "Request cancelled by on_body"); |
516 | } else { |
770 | |
517 | if (exists $hdr{"content-length"}) { |
|
|
518 | $_[0]->unshift_read (chunk => $hdr{"content-length"}, sub { |
|
|
519 | # could cache persistent connection now |
|
|
520 | if ($hdr{connection} =~ /\bkeep-alive\b/i) { |
|
|
521 | # but we don't, due to misdesigns, this is annoyingly complex |
|
|
522 | }; |
771 | $len > 0 |
523 | |
772 | or $finish->("", undef, undef, 1); |
524 | $finish->($_[1], \%hdr); |
|
|
525 | }); |
773 | }); |
526 | } else { |
774 | } else { |
527 | # too bad, need to read until we get an error or EOF, |
775 | $_[0]->on_eof (sub { |
528 | # no way to detect winged data. |
776 | $finish->(""); |
|
|
777 | }); |
|
|
778 | $_[0]->on_read (sub { |
|
|
779 | $arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
|
|
780 | or $finish->(undef, 598 => "Request cancelled by on_body"); |
|
|
781 | }); |
|
|
782 | } |
|
|
783 | } else { |
|
|
784 | $_[0]->on_eof (undef); |
|
|
785 | |
|
|
786 | if ($len) { |
|
|
787 | $_[0]->on_error (sub { $finish->(undef, 599 => $_[2]) }); |
|
|
788 | $_[0]->on_read (sub { |
|
|
789 | $finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1) |
|
|
790 | if $len <= length $_[0]{rbuf}; |
|
|
791 | }); |
|
|
792 | } else { |
529 | $_[0]->on_error (sub { |
793 | $_[0]->on_error (sub { |
530 | # delete ought to be more efficient, as we would have to make |
794 | ($! == Errno::EPIPE || !$!) |
531 | # a copy otherwise as $_[0] gets destroyed. |
|
|
532 | $finish->(delete $_[0]{rbuf}, \%hdr); |
795 | ? $finish->(delete $_[0]{rbuf}) |
|
|
796 | : $finish->(undef, 599 => $_[2]); |
533 | }); |
797 | }); |
534 | $_[0]->on_eof (undef); |
|
|
535 | $_[0]->on_read (sub { }); |
798 | $_[0]->on_read (sub { }); |
536 | } |
799 | } |
537 | } |
800 | } |
538 | }); |
801 | } |
539 | }); |
802 | }); |
540 | }; |
803 | }; |
541 | |
804 | |
542 | # now handle proxy-CONNECT method |
805 | # now handle proxy-CONNECT method |
543 | if ($proxy && $uscheme eq "https") { |
806 | if ($proxy && $uscheme eq "https") { |
… | |
… | |
545 | |
808 | |
546 | # maybe re-use $uauthority with patched port? |
809 | # maybe re-use $uauthority with patched port? |
547 | $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); |
810 | $state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); |
548 | $state{handle}->push_read (line => $qr_nlnl, sub { |
811 | $state{handle}->push_read (line => $qr_nlnl, sub { |
549 | $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix |
812 | $_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix |
550 | or return (%state = (), $cb->(undef, { Status => 599, Reason => "invalid proxy connect response ($_[1])", URL => $url })); |
813 | or return (%state = (), $cb->(undef, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" })); |
551 | |
814 | |
552 | if ($2 == 200) { |
815 | if ($2 == 200) { |
553 | $rpath = $upath; |
816 | $rpath = $upath; |
554 | &$handle_actual_request; |
817 | &$handle_actual_request; |
555 | } else { |
818 | } else { |
556 | %state = (); |
819 | %state = (); |
557 | $cb->(undef, { Status => $2, Reason => $3, URL => $url }); |
820 | $cb->(undef, { @pseudo, Status => $2, Reason => $3 }); |
558 | } |
821 | } |
559 | }); |
822 | }); |
560 | } else { |
823 | } else { |
561 | &$handle_actual_request; |
824 | &$handle_actual_request; |
562 | } |
825 | } |
563 | |
|
|
564 | }, sub { |
|
|
565 | $timeout |
|
|
566 | }; |
826 | }; |
|
|
827 | |
|
|
828 | my $tcp_connect = $arg{tcp_connect} |
|
|
829 | || do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect }; |
|
|
830 | |
|
|
831 | $state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout }); |
|
|
832 | |
567 | }; |
833 | }; |
568 | |
834 | |
569 | defined wantarray && AnyEvent::Util::guard { %state = () } |
835 | defined wantarray && AnyEvent::Util::guard { %state = () } |
570 | } |
836 | } |
571 | |
837 | |
… | |
… | |
585 | &http_request |
851 | &http_request |
586 | } |
852 | } |
587 | |
853 | |
588 | =back |
854 | =back |
589 | |
855 | |
|
|
856 | =head2 DNS CACHING |
|
|
857 | |
|
|
858 | AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for |
|
|
859 | the actual connection, which in turn uses AnyEvent::DNS to resolve |
|
|
860 | hostnames. The latter is a simple stub resolver and does no caching |
|
|
861 | on its own. If you want DNS caching, you currently have to provide |
|
|
862 | your own default resolver (by storing a suitable resolver object in |
|
|
863 | C<$AnyEvent::DNS::RESOLVER>). |
|
|
864 | |
590 | =head2 GLOBAL FUNCTIONS AND VARIABLES |
865 | =head2 GLOBAL FUNCTIONS AND VARIABLES |
591 | |
866 | |
592 | =over 4 |
867 | =over 4 |
593 | |
868 | |
594 | =item AnyEvent::HTTP::set_proxy "proxy-url" |
869 | =item AnyEvent::HTTP::set_proxy "proxy-url" |
595 | |
870 | |
596 | Sets the default proxy server to use. The proxy-url must begin with a |
871 | Sets the default proxy server to use. The proxy-url must begin with a |
597 | string of the form C<http://host:port> (optionally C<https:...>). |
872 | string of the form C<http://host:port> (optionally C<https:...>), croaks |
|
|
873 | otherwise. |
|
|
874 | |
|
|
875 | To clear an already-set proxy, use C<undef>. |
|
|
876 | |
|
|
877 | =item $date = AnyEvent::HTTP::format_date $timestamp |
|
|
878 | |
|
|
879 | Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP |
|
|
880 | Date (RFC 2616). |
|
|
881 | |
|
|
882 | =item $timestamp = AnyEvent::HTTP::parse_date $date |
|
|
883 | |
|
|
884 | Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX |
|
|
885 | timestamp, or C<undef> if the date cannot be parsed. |
598 | |
886 | |
599 | =item $AnyEvent::HTTP::MAX_RECURSE |
887 | =item $AnyEvent::HTTP::MAX_RECURSE |
600 | |
888 | |
601 | The default value for the C<recurse> request parameter (default: C<10>). |
889 | The default value for the C<recurse> request parameter (default: C<10>). |
602 | |
890 | |
603 | =item $AnyEvent::HTTP::USERAGENT |
891 | =item $AnyEvent::HTTP::USERAGENT |
604 | |
892 | |
605 | The default value for the C<User-Agent> header (the default is |
893 | The default value for the C<User-Agent> header (the default is |
606 | C<Mozilla/5.0 (compatible; AnyEvent::HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). |
894 | C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). |
607 | |
895 | |
608 | =item $AnyEvent::HTTP::MAX_PERSISTENT |
896 | =item $AnyEvent::HTTP::MAX_PER_HOST |
609 | |
897 | |
610 | The maximum number of persistent connections to keep open (default: 8). |
898 | The maximum number of concurrent connections to the same host (identified |
|
|
899 | by the hostname). If the limit is exceeded, then the additional requests |
|
|
900 | are queued until previous connections are closed. |
611 | |
901 | |
612 | Not implemented currently. |
902 | The default value for this is C<4>, and it is highly advisable to not |
613 | |
903 | increase it. |
614 | =item $AnyEvent::HTTP::PERSISTENT_TIMEOUT |
|
|
615 | |
|
|
616 | The maximum time to cache a persistent connection, in seconds (default: 2). |
|
|
617 | |
|
|
618 | Not implemented currently. |
|
|
619 | |
904 | |
620 | =item $AnyEvent::HTTP::ACTIVE |
905 | =item $AnyEvent::HTTP::ACTIVE |
621 | |
906 | |
622 | The number of active connections. This is not the number of currently |
907 | The number of active connections. This is not the number of currently |
623 | running requests, but the number of currently open and non-idle TCP |
908 | running requests, but the number of currently open and non-idle TCP |
… | |
… | |
625 | |
910 | |
626 | =back |
911 | =back |
627 | |
912 | |
628 | =cut |
913 | =cut |
629 | |
914 | |
|
|
915 | our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec); |
|
|
916 | our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat); |
|
|
917 | |
|
|
918 | sub format_date($) { |
|
|
919 | my ($time) = @_; |
|
|
920 | |
|
|
921 | # RFC 822/1123 format |
|
|
922 | my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time; |
|
|
923 | |
|
|
924 | sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT", |
|
|
925 | $weekday[$wday], $mday, $month[$mon], $year + 1900, |
|
|
926 | $H, $M, $S; |
|
|
927 | } |
|
|
928 | |
|
|
929 | sub parse_date($) { |
|
|
930 | my ($date) = @_; |
|
|
931 | |
|
|
932 | my ($d, $m, $y, $H, $M, $S); |
|
|
933 | |
|
|
934 | if ($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$/) { |
|
|
935 | # RFC 822/1123, required by RFC 2616 |
|
|
936 | ($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6); |
|
|
937 | |
|
|
938 | } elsif ($date =~ /^[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$/) { |
|
|
939 | # RFC 850 |
|
|
940 | ($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6); |
|
|
941 | |
|
|
942 | } elsif ($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])$/) { |
|
|
943 | # ISO C's asctime |
|
|
944 | ($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5); |
|
|
945 | } |
|
|
946 | # other formats fail in the loop below |
|
|
947 | |
|
|
948 | for (0..11) { |
|
|
949 | if ($m eq $month[$_]) { |
|
|
950 | require Time::Local; |
|
|
951 | return Time::Local::timegm ($S, $M, $H, $d, $_, $y); |
|
|
952 | } |
|
|
953 | } |
|
|
954 | |
|
|
955 | undef |
|
|
956 | } |
|
|
957 | |
630 | sub set_proxy($) { |
958 | sub set_proxy($) { |
|
|
959 | if (length $_[0]) { |
631 | $PROXY = [$2, $3 || 3128, $1] if $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix; |
960 | $_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix |
|
|
961 | or Carp::croak "$_[0]: invalid proxy URL"; |
|
|
962 | $PROXY = [$2, $3 || 3128, $1] |
|
|
963 | } else { |
|
|
964 | undef $PROXY; |
|
|
965 | } |
632 | } |
966 | } |
633 | |
967 | |
634 | # initialise proxy from environment |
968 | # initialise proxy from environment |
|
|
969 | eval { |
635 | set_proxy $ENV{http_proxy}; |
970 | set_proxy $ENV{http_proxy}; |
|
|
971 | }; |
|
|
972 | |
|
|
973 | =head2 SOCKS PROXIES |
|
|
974 | |
|
|
975 | Socks proxies are not directly supported by AnyEvent::HTTP. You can |
|
|
976 | compile your perl to support socks, or use an external program such as |
|
|
977 | F<socksify> (dante) or F<tsocks> to make your program use a socks proxy |
|
|
978 | transparently. |
|
|
979 | |
|
|
980 | Alternatively, for AnyEvent::HTTP only, you can use your own |
|
|
981 | C<tcp_connect> function that does the proxy handshake - here is an example |
|
|
982 | that works with socks4a proxies: |
|
|
983 | |
|
|
984 | use Errno; |
|
|
985 | use AnyEvent::Util; |
|
|
986 | use AnyEvent::Socket; |
|
|
987 | use AnyEvent::Handle; |
|
|
988 | |
|
|
989 | # host, port and username of/for your socks4a proxy |
|
|
990 | my $socks_host = "10.0.0.23"; |
|
|
991 | my $socks_port = 9050; |
|
|
992 | my $socks_user = ""; |
|
|
993 | |
|
|
994 | sub socks4a_connect { |
|
|
995 | my ($host, $port, $connect_cb, $prepare_cb) = @_; |
|
|
996 | |
|
|
997 | my $hdl = new AnyEvent::Handle |
|
|
998 | connect => [$socks_host, $socks_port], |
|
|
999 | on_prepare => sub { $prepare_cb->($_[0]{fh}) }, |
|
|
1000 | on_error => sub { $connect_cb->() }, |
|
|
1001 | ; |
|
|
1002 | |
|
|
1003 | $hdl->push_write (pack "CCnNZ*Z*", 4, 1, $port, 1, $socks_user, $host); |
|
|
1004 | |
|
|
1005 | $hdl->push_read (chunk => 8, sub { |
|
|
1006 | my ($hdl, $chunk) = @_; |
|
|
1007 | my ($status, $port, $ipn) = unpack "xCna4", $chunk; |
|
|
1008 | |
|
|
1009 | if ($status == 0x5a) { |
|
|
1010 | $connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port"); |
|
|
1011 | } else { |
|
|
1012 | $! = Errno::ENXIO; $connect_cb->(); |
|
|
1013 | } |
|
|
1014 | }); |
|
|
1015 | |
|
|
1016 | $hdl |
|
|
1017 | } |
|
|
1018 | |
|
|
1019 | Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s, |
|
|
1020 | possibly after switching off other proxy types: |
|
|
1021 | |
|
|
1022 | AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies |
|
|
1023 | |
|
|
1024 | http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub { |
|
|
1025 | my ($data, $headers) = @_; |
|
|
1026 | ... |
|
|
1027 | }; |
636 | |
1028 | |
637 | =head1 SEE ALSO |
1029 | =head1 SEE ALSO |
638 | |
1030 | |
639 | L<AnyEvent>. |
1031 | L<AnyEvent>. |
640 | |
1032 | |