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50 | object at least alive until the callback get called. If the object |
50 | object at least alive until the callback get called. If the object |
51 | gets destroyed before the callback is called, the request will be |
51 | gets destroyed before the callback is called, the request will be |
52 | cancelled. |
52 | cancelled. |
53 | |
53 | |
54 | The callback will be called with the response body data as first |
54 | The callback will be called with the response body data as first |
55 | argument (or "undef" if an error occured), and a hash-ref with |
55 | argument (or "undef" if an error occurred), and a hash-ref with |
56 | response headers (and trailers) as second argument. |
56 | response headers (and trailers) as second argument. |
57 | |
57 | |
58 | All the headers in that hash are lowercased. In addition to the |
58 | All the headers in that hash are lowercased. In addition to the |
59 | response headers, the "pseudo-headers" (uppercase to avoid clashing |
59 | response headers, the "pseudo-headers" (uppercase to avoid clashing |
60 | with possible response headers) "HTTPVersion", "Status" and "Reason" |
60 | with possible response headers) "HTTPVersion", "Status" and "Reason" |
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82 | If an internal error occurs, such as not being able to resolve a |
82 | If an internal error occurs, such as not being able to resolve a |
83 | hostname, then $data will be "undef", "$headers->{Status}" will be |
83 | hostname, then $data will be "undef", "$headers->{Status}" will be |
84 | 590-599 and the "Reason" pseudo-header will contain an error |
84 | 590-599 and the "Reason" pseudo-header will contain an error |
85 | message. Currently the following status codes are used: |
85 | message. Currently the following status codes are used: |
86 | |
86 | |
87 | 595 - errors during connection etsbalishment, proxy handshake. |
87 | 595 - errors during connection establishment, proxy handshake. |
88 | 596 - errors during TLS negotiation, request sending and header |
88 | 596 - errors during TLS negotiation, request sending and header |
89 | processing. |
89 | processing. |
90 | 597 - errors during body receiving or processing. |
90 | 597 - errors during body receiving or processing. |
91 | 598 - user aborted request via "on_header" or "on_body". |
91 | 598 - user aborted request via "on_header" or "on_body". |
92 | 599 - other, usually nonretryable, errors (garbled URL etc.). |
92 | 599 - other, usually nonretryable, errors (garbled URL etc.). |
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106 | Additional parameters are key-value pairs, and are fully optional. |
106 | Additional parameters are key-value pairs, and are fully optional. |
107 | They include: |
107 | They include: |
108 | |
108 | |
109 | recurse => $count (default: $MAX_RECURSE) |
109 | recurse => $count (default: $MAX_RECURSE) |
110 | Whether to recurse requests or not, e.g. on redirects, |
110 | Whether to recurse requests or not, e.g. on redirects, |
111 | authentication retries and so on, and how often to do so. |
111 | authentication and other retries and so on, and how often to do |
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112 | so. |
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113 | |
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114 | Only redirects to http and https URLs are supported. While most |
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115 | common redirection forms are handled entirely within this |
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116 | module, some require the use of the optional URI module. If it |
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117 | is required but missing, then the request will fail with an |
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118 | error. |
112 | |
119 | |
113 | headers => hashref |
120 | headers => hashref |
114 | The request headers to use. Currently, "http_request" may |
121 | The request headers to use. Currently, "http_request" may |
115 | provide its own "Host:", "Content-Length:", "Connection:" and |
122 | provide its own "Host:", "Content-Length:", "Connection:" and |
116 | "Cookie:" headers and will provide defaults at least for "TE:", |
123 | "Cookie:" headers and will provide defaults at least for "TE:", |
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188 | object storing your state data, or the TLS context) - only |
195 | object storing your state data, or the TLS context) - only |
189 | connections using the same unique ID will be reused. |
196 | connections using the same unique ID will be reused. |
190 | |
197 | |
191 | on_prepare => $callback->($fh) |
198 | on_prepare => $callback->($fh) |
192 | In rare cases you need to "tune" the socket before it is used to |
199 | In rare cases you need to "tune" the socket before it is used to |
193 | connect (for exmaple, to bind it on a given IP address). This |
200 | connect (for example, to bind it on a given IP address). This |
194 | parameter overrides the prepare callback passed to |
201 | parameter overrides the prepare callback passed to |
195 | "AnyEvent::Socket::tcp_connect" and behaves exactly the same way |
202 | "AnyEvent::Socket::tcp_connect" and behaves exactly the same way |
196 | (e.g. it has to provide a timeout). See the description for the |
203 | (e.g. it has to provide a timeout). See the description for the |
197 | $prepare_cb argument of "AnyEvent::Socket::tcp_connect" for |
204 | $prepare_cb argument of "AnyEvent::Socket::tcp_connect" for |
198 | details. |
205 | details. |
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371 | Sets the default proxy server to use. The proxy-url must begin with |
378 | Sets the default proxy server to use. The proxy-url must begin with |
372 | a string of the form "http://host:port", croaks otherwise. |
379 | a string of the form "http://host:port", croaks otherwise. |
373 | |
380 | |
374 | To clear an already-set proxy, use "undef". |
381 | To clear an already-set proxy, use "undef". |
375 | |
382 | |
376 | When AnyEvent::HTTP is laoded for the first time it will query the |
383 | When AnyEvent::HTTP is loaded for the first time it will query the |
377 | default proxy from the operating system, currently by looking at |
384 | default proxy from the operating system, currently by looking at |
378 | "$ENV{http_proxy"}. |
385 | "$ENV{http_proxy"}. |
379 | |
386 | |
380 | AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end] |
387 | AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end] |
381 | Remove all cookies from the cookie jar that have been expired. If |
388 | Remove all cookies from the cookie jar that have been expired. If |
… | |
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383 | cookies. |
390 | cookies. |
384 | |
391 | |
385 | You should call this function (with a true $session_end) before you |
392 | You should call this function (with a true $session_end) before you |
386 | save cookies to disk, and you should call this function after |
393 | save cookies to disk, and you should call this function after |
387 | loading them again. If you have a long-running program you can |
394 | loading them again. If you have a long-running program you can |
388 | additonally call this function from time to time. |
395 | additionally call this function from time to time. |
389 | |
396 | |
390 | A cookie jar is initially an empty hash-reference that is managed by |
397 | A cookie jar is initially an empty hash-reference that is managed by |
391 | this module. It's format is subject to change, but currently it is |
398 | this module. It's format is subject to change, but currently it is |
392 | like this: |
399 | like this: |
393 | |
400 | |
394 | The key "version" has to contain 1, otherwise the hash gets emptied. |
401 | The key "version" has to contain 1, otherwise the hash gets emptied. |
395 | All other keys are hostnames or IP addresses pointing to |
402 | All other keys are hostnames or IP addresses pointing to |
396 | hash-references. The key for these inner hash references is the |
403 | hash-references. The key for these inner hash references is the |
397 | server path for which this cookie is meant, and the values are again |
404 | server path for which this cookie is meant, and the values are again |
398 | hash-references. The keys of those hash-references is the cookie |
405 | hash-references. Each key of those hash-references is a cookie name, |
399 | name, and the value, you guessed it, is another hash-reference, this |
406 | and the value, you guessed it, is another hash-reference, this time |
400 | time with the key-value pairs from the cookie, except for "expires" |
407 | with the key-value pairs from the cookie, except for "expires" and |
401 | and "max-age", which have been replaced by a "_expires" key that |
408 | "max-age", which have been replaced by a "_expires" key that |
402 | contains the cookie expiry timestamp. |
409 | contains the cookie expiry timestamp. Session cookies are indicated |
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410 | by not having an "_expires" key. |
403 | |
411 | |
404 | Here is an example of a cookie jar with a single cookie, so you have |
412 | Here is an example of a cookie jar with a single cookie, so you have |
405 | a chance of understanding the above paragraph: |
413 | a chance of understanding the above paragraph: |
406 | |
414 | |
407 | { |
415 | { |
… | |
… | |
428 | |
436 | |
429 | $AnyEvent::HTTP::MAX_RECURSE |
437 | $AnyEvent::HTTP::MAX_RECURSE |
430 | The default value for the "recurse" request parameter (default: 10). |
438 | The default value for the "recurse" request parameter (default: 10). |
431 | |
439 | |
432 | $AnyEvent::HTTP::TIMEOUT |
440 | $AnyEvent::HTTP::TIMEOUT |
433 | The default timeout for conenction operations (default: 300). |
441 | The default timeout for connection operations (default: 300). |
434 | |
442 | |
435 | $AnyEvent::HTTP::USERAGENT |
443 | $AnyEvent::HTTP::USERAGENT |
436 | The default value for the "User-Agent" header (the default is |
444 | The default value for the "User-Agent" header (the default is |
437 | "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; |
445 | "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; |
438 | +http://software.schmorp.de/pkg/AnyEvent)"). |
446 | +http://software.schmorp.de/pkg/AnyEvent)"). |
… | |
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446 | |
454 | |
447 | The default value for this is 4, and it is highly advisable to not |
455 | The default value for this is 4, and it is highly advisable to not |
448 | increase it much. |
456 | increase it much. |
449 | |
457 | |
450 | For comparison: the RFC's recommend 4 non-persistent or 2 persistent |
458 | For comparison: the RFC's recommend 4 non-persistent or 2 persistent |
451 | connections, older browsers used 2, newers (such as firefox 3) |
459 | connections, older browsers used 2, newer ones (such as firefox 3) |
452 | typically use 6, and Opera uses 8 because like, they have the |
460 | typically use 6, and Opera uses 8 because like, they have the |
453 | fastest browser and give a shit for everybody else on the planet. |
461 | fastest browser and give a shit for everybody else on the planet. |
454 | |
462 | |
455 | $AnyEvent::HTTP::PERSISTENT_TIMEOUT |
463 | $AnyEvent::HTTP::PERSISTENT_TIMEOUT |
456 | The time after which idle persistent conenctions get closed by |
464 | The time after which idle persistent connections get closed by |
457 | AnyEvent::HTTP (default: 3). |
465 | AnyEvent::HTTP (default: 3). |
458 | |
466 | |
459 | $AnyEvent::HTTP::ACTIVE |
467 | $AnyEvent::HTTP::ACTIVE |
460 | The number of active connections. This is not the number of |
468 | The number of active connections. This is not the number of |
461 | currently running requests, but the number of currently open and |
469 | currently running requests, but the number of currently open and |
462 | non-idle TCP connections. This number can be useful for |
470 | non-idle TCP connections. This number can be useful for |
463 | load-leveling. |
471 | load-leveling. |
464 | |
472 | |
465 | SHOWCASE |
473 | SHOWCASE |
466 | This section contaisn some more elaborate "real-world" examples or code |
474 | This section contains some more elaborate "real-world" examples or code |
467 | snippets. |
475 | snippets. |
468 | |
476 | |
469 | HTTP/1.1 FILE DOWNLOAD |
477 | HTTP/1.1 FILE DOWNLOAD |
470 | Downloading files with HTTP can be quite tricky, especially when |
478 | Downloading files with HTTP can be quite tricky, especially when |
471 | something goes wrong and you want to resume. |
479 | something goes wrong and you want to resume. |
… | |
… | |
474 | last modified time to check for file content changes, and works with |
482 | last modified time to check for file content changes, and works with |
475 | many HTTP/1.0 servers as well, and usually falls back to a complete |
483 | many HTTP/1.0 servers as well, and usually falls back to a complete |
476 | re-download on older servers. |
484 | re-download on older servers. |
477 | |
485 | |
478 | It calls the completion callback with either "undef", which means a |
486 | It calls the completion callback with either "undef", which means a |
479 | nonretryable error occured, 0 when the download was partial and should |
487 | nonretryable error occurred, 0 when the download was partial and should |
480 | be retried, and 1 if it was successful. |
488 | be retried, and 1 if it was successful. |
481 | |
489 | |
482 | use AnyEvent::HTTP; |
490 | use AnyEvent::HTTP; |
483 | |
491 | |
484 | sub download($$$) { |
492 | sub download($$$) { |
… | |
… | |
622 | |
630 | |
623 | AUTHOR |
631 | AUTHOR |
624 | Marc Lehmann <schmorp@schmorp.de> |
632 | Marc Lehmann <schmorp@schmorp.de> |
625 | http://home.schmorp.de/ |
633 | http://home.schmorp.de/ |
626 | |
634 | |
627 | With many thanks to Дмитрий Шалашов, who provided |
635 | With many thanks to Дмитрий Шалашов, who provided countless testcases |
628 | countless testcases and bugreports. |
636 | and bugreports. |
629 | |
637 | |