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1.1 |
=head1 NAME |
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AnyEvent::HTTP - simple but non-blocking HTTP/HTTPS client |
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=head1 SYNOPSIS |
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use AnyEvent::HTTP; |
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1.17 |
http_get "http://www.nethype.de/", sub { print $_[1] }; |
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# ... do something else here |
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1.1 |
=head1 DESCRIPTION |
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This module is an L<AnyEvent> user, you need to make sure that you use and |
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run a supported event loop. |
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1.11 |
This module implements a simple, stateless and non-blocking HTTP |
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client. It supports GET, POST and other request methods, cookies and more, |
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all on a very low level. It can follow redirects, supports proxies, and |
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1.11 |
automatically limits the number of connections to the values specified in |
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the RFC. |
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It should generally be a "good client" that is enough for most HTTP |
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tasks. Simple tasks should be simple, but complex tasks should still be |
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possible as the user retains control over request and response headers. |
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The caller is responsible for authentication management, cookies (if |
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the simplistic implementation in this module doesn't suffice), referer |
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and other high-level protocol details for which this module offers only |
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limited support. |
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1.1 |
=head2 METHODS |
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=over 4 |
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=cut |
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package AnyEvent::HTTP; |
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1.85 |
use common::sense; |
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1.1 |
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1.41 |
use Errno (); |
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1.1 |
|
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1.51 |
use AnyEvent 5.0 (); |
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1.1 |
use AnyEvent::Util (); |
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use AnyEvent::Handle (); |
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use base Exporter::; |
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1.107 |
our $VERSION = '2.12'; |
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1.1 |
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1.17 |
our @EXPORT = qw(http_get http_post http_head http_request); |
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1.1 |
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1.40 |
our $USERAGENT = "Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)"; |
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1.3 |
our $MAX_RECURSE = 10; |
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1.92 |
our $PERSISTENT_TIMEOUT = 3; |
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1.2 |
our $TIMEOUT = 300; |
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1.92 |
our $MAX_PER_HOST = 4; # changing this is evil |
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1.1 |
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1.2 |
our $PROXY; |
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1.14 |
our $ACTIVE = 0; |
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1.2 |
|
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1.92 |
my %KA_CACHE; # indexed by uhost currently, points to [$handle...] array |
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1.11 |
my %CO_SLOT; # number of open connections, and wait queue, per host |
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1.1 |
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=item http_get $url, key => value..., $cb->($data, $headers) |
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Executes an HTTP-GET request. See the http_request function for details on |
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1.29 |
additional parameters and the return value. |
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1.1 |
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1.5 |
=item http_head $url, key => value..., $cb->($data, $headers) |
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1.29 |
Executes an HTTP-HEAD request. See the http_request function for details |
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on additional parameters and the return value. |
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1.5 |
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=item http_post $url, $body, key => value..., $cb->($data, $headers) |
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1.3 |
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1.26 |
Executes an HTTP-POST request with a request body of C<$body>. See the |
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1.29 |
http_request function for details on additional parameters and the return |
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value. |
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1.3 |
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1.1 |
=item http_request $method => $url, key => value..., $cb->($data, $headers) |
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Executes a HTTP request of type C<$method> (e.g. C<GET>, C<POST>). The URL |
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must be an absolute http or https URL. |
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1.29 |
When called in void context, nothing is returned. In other contexts, |
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C<http_request> returns a "cancellation guard" - you have to keep the |
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object at least alive until the callback get called. If the object gets |
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1.58 |
destroyed before the callback is called, the request will be cancelled. |
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1.29 |
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1.42 |
The callback will be called with the response body data as first argument |
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1.68 |
(or C<undef> if an error occured), and a hash-ref with response headers |
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(and trailers) as second argument. |
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1.2 |
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1.7 |
All the headers in that hash are lowercased. In addition to the response |
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1.55 |
headers, the "pseudo-headers" (uppercase to avoid clashing with possible |
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response headers) C<HTTPVersion>, C<Status> and C<Reason> contain the |
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1.64 |
three parts of the HTTP Status-Line of the same name. If an error occurs |
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during the body phase of a request, then the original C<Status> and |
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C<Reason> values from the header are available as C<OrigStatus> and |
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C<OrigReason>. |
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1.55 |
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The pseudo-header C<URL> contains the actual URL (which can differ from |
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the requested URL when following redirects - for example, you might get |
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an error that your URL scheme is not supported even though your URL is a |
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valid http URL because it redirected to an ftp URL, in which case you can |
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look at the URL pseudo header). |
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The pseudo-header C<Redirect> only exists when the request was a result |
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of an internal redirect. In that case it is an array reference with |
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the C<($data, $headers)> from the redirect response. Note that this |
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response could in turn be the result of a redirect itself, and C<< |
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$headers->{Redirect}[1]{Redirect} >> will then contain the original |
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response, and so on. |
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1.20 |
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1.32 |
If the server sends a header multiple times, then their contents will be |
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joined together with a comma (C<,>), as per the HTTP spec. |
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1.2 |
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If an internal error occurs, such as not being able to resolve a hostname, |
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1.77 |
then C<$data> will be C<undef>, C<< $headers->{Status} >> will be |
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C<590>-C<599> and the C<Reason> pseudo-header will contain an error |
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message. Currently the following status codes are used: |
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=over 4 |
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=item 595 - errors during connection etsbalishment, proxy handshake. |
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=item 596 - errors during TLS negotiation, request sending and header processing. |
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=item 597 - errors during body receiving or processing. |
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1.77 |
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1.78 |
=item 598 - user aborted request via C<on_header> or C<on_body>. |
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1.77 |
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=item 599 - other, usually nonretryable, errors (garbled URL etc.). |
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=back |
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1.2 |
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1.6 |
A typical callback might look like this: |
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sub { |
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my ($body, $hdr) = @_; |
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if ($hdr->{Status} =~ /^2/) { |
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... everything should be ok |
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} else { |
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print "error, $hdr->{Status} $hdr->{Reason}\n"; |
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} |
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} |
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1.1 |
Additional parameters are key-value pairs, and are fully optional. They |
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include: |
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=over 4 |
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1.3 |
=item recurse => $count (default: $MAX_RECURSE) |
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1.1 |
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Whether to recurse requests or not, e.g. on redirects, authentication |
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1.3 |
retries and so on, and how often to do so. |
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1.1 |
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=item headers => hashref |
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1.68 |
The request headers to use. Currently, C<http_request> may provide its own |
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C<Host:>, C<Content-Length:>, C<Connection:> and C<Cookie:> headers and |
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1.69 |
will provide defaults at least for C<TE:>, C<Referer:> and C<User-Agent:> |
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(this can be suppressed by using C<undef> for these headers in which case |
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they won't be sent at all). |
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1.1 |
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1.90 |
You really should provide your own C<User-Agent:> header value that is |
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appropriate for your program - I wouldn't be surprised if the default |
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AnyEvent string gets blocked by webservers sooner or later. |
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1.104 |
Also, make sure that your headers names and values do not contain any |
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embedded newlines. |
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1.1 |
=item timeout => $seconds |
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The time-out to use for various stages - each connect attempt will reset |
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1.51 |
the timeout, as will read or write activity, i.e. this is not an overall |
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timeout. |
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Default timeout is 5 minutes. |
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1.2 |
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=item proxy => [$host, $port[, $scheme]] or undef |
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1.102 |
Use the given http proxy for all requests, or no proxy if C<undef> is |
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used. |
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1.2 |
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1.92 |
C<$scheme> must be either missing or must be C<http> for HTTP. |
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1.1 |
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1.102 |
If not specified, then the default proxy is used (see |
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C<AnyEvent::HTTP::set_proxy>). |
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1.3 |
=item body => $string |
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1.68 |
The request body, usually empty. Will be sent as-is (future versions of |
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1.3 |
this module might offer more options). |
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1.10 |
=item cookie_jar => $hash_ref |
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Passing this parameter enables (simplified) cookie-processing, loosely |
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based on the original netscape specification. |
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1.80 |
The C<$hash_ref> must be an (initially empty) hash reference which |
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will get updated automatically. It is possible to save the cookie jar |
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to persistent storage with something like JSON or Storable - see the |
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C<AnyEvent::HTTP::cookie_jar_expire> function if you wish to remove |
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expired or session-only cookies, and also for documentation on the format |
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of the cookie jar. |
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1.10 |
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1.70 |
Note that this cookie implementation is not meant to be complete. If |
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you want complete cookie management you have to do that on your |
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1.80 |
own. C<cookie_jar> is meant as a quick fix to get most cookie-using sites |
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1.70 |
working. Cookies are a privacy disaster, do not use them unless required |
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to. |
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1.10 |
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1.69 |
When cookie processing is enabled, the C<Cookie:> and C<Set-Cookie:> |
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1.70 |
headers will be set and handled by this module, otherwise they will be |
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1.69 |
left untouched. |
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1.40 |
=item tls_ctx => $scheme | $tls_ctx |
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Specifies the AnyEvent::TLS context to be used for https connections. This |
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parameter follows the same rules as the C<tls_ctx> parameter to |
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L<AnyEvent::Handle>, but additionally, the two strings C<low> or |
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C<high> can be specified, which give you a predefined low-security (no |
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verification, highest compatibility) and high-security (CA and common-name |
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verification) TLS context. |
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The default for this option is C<low>, which could be interpreted as "give |
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me the page, no matter what". |
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1.92 |
See also the C<sessionid> parameter. |
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=item session => $string |
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The module might reuse connections to the same host internally. Sometimes |
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(e.g. when using TLS), you do not want to reuse connections from other |
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sessions. This can be achieved by setting this parameter to some unique |
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ID (such as the address of an object storing your state data, or the TLS |
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context) - only connections using the same unique ID will be reused. |
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1.51 |
=item on_prepare => $callback->($fh) |
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In rare cases you need to "tune" the socket before it is used to |
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connect (for exmaple, to bind it on a given IP address). This parameter |
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overrides the prepare callback passed to C<AnyEvent::Socket::tcp_connect> |
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and behaves exactly the same way (e.g. it has to provide a |
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timeout). See the description for the C<$prepare_cb> argument of |
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C<AnyEvent::Socket::tcp_connect> for details. |
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1.59 |
=item tcp_connect => $callback->($host, $service, $connect_cb, $prepare_cb) |
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In even rarer cases you want total control over how AnyEvent::HTTP |
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establishes connections. Normally it uses L<AnyEvent::Socket::tcp_connect> |
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to do this, but you can provide your own C<tcp_connect> function - |
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1.60 |
obviously, it has to follow the same calling conventions, except that it |
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may always return a connection guard object. |
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1.59 |
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There are probably lots of weird uses for this function, starting from |
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tracing the hosts C<http_request> actually tries to connect, to (inexact |
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but fast) host => IP address caching or even socks protocol support. |
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1.42 |
=item on_header => $callback->($headers) |
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1.41 |
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When specified, this callback will be called with the header hash as soon |
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as headers have been successfully received from the remote server (not on |
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locally-generated errors). |
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It has to return either true (in which case AnyEvent::HTTP will continue), |
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or false, in which case AnyEvent::HTTP will cancel the download (and call |
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the finish callback with an error code of C<598>). |
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This callback is useful, among other things, to quickly reject unwanted |
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content, which, if it is supposed to be rare, can be faster than first |
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doing a C<HEAD> request. |
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1.68 |
The downside is that cancelling the request makes it impossible to re-use |
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the connection. Also, the C<on_header> callback will not receive any |
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trailer (headers sent after the response body). |
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1.42 |
Example: cancel the request unless the content-type is "text/html". |
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1.41 |
|
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1.42 |
on_header => sub { |
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$_[0]{"content-type"} =~ /^text\/html\s*(?:;|$)/ |
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}, |
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1.41 |
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1.42 |
=item on_body => $callback->($partial_body, $headers) |
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1.41 |
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1.42 |
When specified, all body data will be passed to this callback instead of |
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to the completion callback. The completion callback will get the empty |
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string instead of the body data. |
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1.41 |
|
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1.42 |
It has to return either true (in which case AnyEvent::HTTP will continue), |
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or false, in which case AnyEvent::HTTP will cancel the download (and call |
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the completion callback with an error code of C<598>). |
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1.68 |
The downside to cancelling the request is that it makes it impossible to |
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re-use the connection. |
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1.42 |
This callback is useful when the data is too large to be held in memory |
303 |
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(so the callback writes it to a file) or when only some information should |
304 |
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be extracted, or when the body should be processed incrementally. |
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1.41 |
|
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It is usually preferred over doing your own body handling via |
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1.45 |
C<want_body_handle>, but in case of streaming APIs, where HTTP is |
308 |
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only used to create a connection, C<want_body_handle> is the better |
309 |
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alternative, as it allows you to install your own event handler, reducing |
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resource usage. |
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1.41 |
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=item want_body_handle => $enable |
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When enabled (default is disabled), the behaviour of AnyEvent::HTTP |
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changes considerably: after parsing the headers, and instead of |
316 |
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downloading the body (if any), the completion callback will be |
317 |
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called. Instead of the C<$body> argument containing the body data, the |
318 |
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callback will receive the L<AnyEvent::Handle> object associated with the |
319 |
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connection. In error cases, C<undef> will be passed. When there is no body |
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(e.g. status C<304>), the empty string will be passed. |
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1.92 |
The handle object might or might not be in TLS mode, might be connected |
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to a proxy, be a persistent connection, use chunked transfer encoding |
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etc., and configured in unspecified ways. The user is responsible for this |
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handle (it will not be used by this module anymore). |
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1.41 |
|
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This is useful with some push-type services, where, after the initial |
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headers, an interactive protocol is used (typical example would be the |
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push-style twitter API which starts a JSON/XML stream). |
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If you think you need this, first have a look at C<on_body>, to see if |
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1.45 |
that doesn't solve your problem in a better way. |
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1.41 |
|
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1.92 |
=item persistent => $boolean |
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Try to create/reuse a persistent connection. When this flag is set |
337 |
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(default: true for idempotent requests, false for all others), then |
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C<http_request> tries to re-use an existing (previously-created) |
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persistent connection to the host and, failing that, tries to create a new |
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one. |
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Requests failing in certain ways will be automatically retried once, which |
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is dangerous for non-idempotent requests, which is why it defaults to off |
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for them. The reason for this is because the bozos who designed HTTP/1.1 |
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made it impossible to distinguish between a fatal error and a normal |
346 |
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connection timeout, so you never know whether there was a problem with |
347 |
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your request or not. |
348 |
|
|
|
349 |
|
|
When reusing an existent connection, many parameters (such as TLS context) |
350 |
|
|
will be ignored. See the C<session> parameter for a workaround. |
351 |
|
|
|
352 |
|
|
=item keepalive => $boolean |
353 |
|
|
|
354 |
|
|
Only used when C<persistent> is also true. This parameter decides whether |
355 |
|
|
C<http_request> tries to handshake a HTTP/1.0-style keep-alive connection |
356 |
|
|
(as opposed to only a HTTP/1.1 persistent connection). |
357 |
|
|
|
358 |
|
|
The default is true, except when using a proxy, in which case it defaults |
359 |
|
|
to false, as HTTP/1.0 proxies cannot support this in a meaningful way. |
360 |
|
|
|
361 |
|
|
=item handle_params => { key => value ... } |
362 |
|
|
|
363 |
|
|
The key-value pairs in this hash will be passed to any L<AnyEvent::Handle> |
364 |
|
|
constructor that is called - not all requests will create a handle, and |
365 |
|
|
sometimes more than one is created, so this parameter is only good for |
366 |
|
|
setting hints. |
367 |
|
|
|
368 |
|
|
Example: set the maximum read size to 4096, to potentially conserve memory |
369 |
|
|
at the cost of speed. |
370 |
|
|
|
371 |
|
|
handle_params => { |
372 |
|
|
max_read_size => 4096, |
373 |
|
|
}, |
374 |
|
|
|
375 |
root |
1.1 |
=back |
376 |
|
|
|
377 |
root |
1.68 |
Example: do a simple HTTP GET request for http://www.nethype.de/ and print |
378 |
|
|
the response body. |
379 |
root |
1.9 |
|
380 |
|
|
http_request GET => "http://www.nethype.de/", sub { |
381 |
|
|
my ($body, $hdr) = @_; |
382 |
|
|
print "$body\n"; |
383 |
|
|
}; |
384 |
|
|
|
385 |
root |
1.68 |
Example: do a HTTP HEAD request on https://www.google.com/, use a |
386 |
root |
1.9 |
timeout of 30 seconds. |
387 |
|
|
|
388 |
|
|
http_request |
389 |
|
|
GET => "https://www.google.com", |
390 |
root |
1.90 |
headers => { "user-agent" => "MySearchClient 1.0" }, |
391 |
root |
1.9 |
timeout => 30, |
392 |
|
|
sub { |
393 |
|
|
my ($body, $hdr) = @_; |
394 |
|
|
use Data::Dumper; |
395 |
|
|
print Dumper $hdr; |
396 |
|
|
} |
397 |
|
|
; |
398 |
root |
1.1 |
|
399 |
root |
1.68 |
Example: do another simple HTTP GET request, but immediately try to |
400 |
root |
1.29 |
cancel it. |
401 |
|
|
|
402 |
|
|
my $request = http_request GET => "http://www.nethype.de/", sub { |
403 |
|
|
my ($body, $hdr) = @_; |
404 |
|
|
print "$body\n"; |
405 |
|
|
}; |
406 |
|
|
|
407 |
|
|
undef $request; |
408 |
|
|
|
409 |
root |
1.1 |
=cut |
410 |
|
|
|
411 |
root |
1.92 |
############################################################################# |
412 |
|
|
# wait queue/slots |
413 |
|
|
|
414 |
root |
1.12 |
sub _slot_schedule; |
415 |
root |
1.11 |
sub _slot_schedule($) { |
416 |
|
|
my $host = shift; |
417 |
|
|
|
418 |
|
|
while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) { |
419 |
|
|
if (my $cb = shift @{ $CO_SLOT{$host}[1] }) { |
420 |
root |
1.12 |
# somebody wants that slot |
421 |
root |
1.11 |
++$CO_SLOT{$host}[0]; |
422 |
root |
1.14 |
++$ACTIVE; |
423 |
root |
1.11 |
|
424 |
|
|
$cb->(AnyEvent::Util::guard { |
425 |
root |
1.14 |
--$ACTIVE; |
426 |
root |
1.11 |
--$CO_SLOT{$host}[0]; |
427 |
|
|
_slot_schedule $host; |
428 |
|
|
}); |
429 |
|
|
} else { |
430 |
|
|
# nobody wants the slot, maybe we can forget about it |
431 |
|
|
delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0]; |
432 |
|
|
last; |
433 |
|
|
} |
434 |
|
|
} |
435 |
|
|
} |
436 |
|
|
|
437 |
|
|
# wait for a free slot on host, call callback |
438 |
|
|
sub _get_slot($$) { |
439 |
|
|
push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; |
440 |
|
|
|
441 |
|
|
_slot_schedule $_[0]; |
442 |
|
|
} |
443 |
|
|
|
444 |
root |
1.80 |
############################################################################# |
445 |
root |
1.92 |
# cookie handling |
446 |
root |
1.80 |
|
447 |
|
|
# expire cookies |
448 |
|
|
sub cookie_jar_expire($;$) { |
449 |
|
|
my ($jar, $session_end) = @_; |
450 |
|
|
|
451 |
|
|
%$jar = () if $jar->{version} != 1; |
452 |
|
|
|
453 |
|
|
my $anow = AE::now; |
454 |
|
|
|
455 |
|
|
while (my ($chost, $paths) = each %$jar) { |
456 |
|
|
next unless ref $paths; |
457 |
|
|
|
458 |
|
|
while (my ($cpath, $cookies) = each %$paths) { |
459 |
|
|
while (my ($cookie, $kv) = each %$cookies) { |
460 |
|
|
if (exists $kv->{_expires}) { |
461 |
|
|
delete $cookies->{$cookie} |
462 |
|
|
if $anow > $kv->{_expires}; |
463 |
|
|
} elsif ($session_end) { |
464 |
|
|
delete $cookies->{$cookie}; |
465 |
|
|
} |
466 |
|
|
} |
467 |
|
|
|
468 |
|
|
delete $paths->{$cpath} |
469 |
|
|
unless %$cookies; |
470 |
|
|
} |
471 |
|
|
|
472 |
|
|
delete $jar->{$chost} |
473 |
|
|
unless %$paths; |
474 |
|
|
} |
475 |
|
|
} |
476 |
|
|
|
477 |
root |
1.72 |
# extract cookies from jar |
478 |
root |
1.71 |
sub cookie_jar_extract($$$$) { |
479 |
root |
1.92 |
my ($jar, $scheme, $host, $path) = @_; |
480 |
root |
1.71 |
|
481 |
|
|
%$jar = () if $jar->{version} != 1; |
482 |
|
|
|
483 |
|
|
my @cookies; |
484 |
|
|
|
485 |
|
|
while (my ($chost, $paths) = each %$jar) { |
486 |
|
|
next unless ref $paths; |
487 |
|
|
|
488 |
|
|
if ($chost =~ /^\./) { |
489 |
root |
1.92 |
next unless $chost eq substr $host, -length $chost; |
490 |
root |
1.71 |
} elsif ($chost =~ /\./) { |
491 |
root |
1.92 |
next unless $chost eq $host; |
492 |
root |
1.71 |
} else { |
493 |
|
|
next; |
494 |
|
|
} |
495 |
|
|
|
496 |
|
|
while (my ($cpath, $cookies) = each %$paths) { |
497 |
root |
1.92 |
next unless $cpath eq substr $path, 0, length $cpath; |
498 |
root |
1.71 |
|
499 |
|
|
while (my ($cookie, $kv) = each %$cookies) { |
500 |
root |
1.92 |
next if $scheme ne "https" && exists $kv->{secure}; |
501 |
root |
1.71 |
|
502 |
root |
1.80 |
if (exists $kv->{_expires} and AE::now > $kv->{_expires}) { |
503 |
|
|
delete $cookies->{$cookie}; |
504 |
|
|
next; |
505 |
root |
1.71 |
} |
506 |
|
|
|
507 |
|
|
my $value = $kv->{value}; |
508 |
|
|
|
509 |
|
|
if ($value =~ /[=;,[:space:]]/) { |
510 |
|
|
$value =~ s/([\\"])/\\$1/g; |
511 |
|
|
$value = "\"$value\""; |
512 |
|
|
} |
513 |
|
|
|
514 |
|
|
push @cookies, "$cookie=$value"; |
515 |
|
|
} |
516 |
|
|
} |
517 |
|
|
} |
518 |
|
|
|
519 |
|
|
\@cookies |
520 |
|
|
} |
521 |
|
|
|
522 |
root |
1.72 |
# parse set_cookie header into jar |
523 |
root |
1.80 |
sub cookie_jar_set_cookie($$$$) { |
524 |
root |
1.92 |
my ($jar, $set_cookie, $host, $date) = @_; |
525 |
root |
1.80 |
|
526 |
|
|
my $anow = int AE::now; |
527 |
|
|
my $snow; # server-now |
528 |
root |
1.72 |
|
529 |
|
|
for ($set_cookie) { |
530 |
|
|
# parse NAME=VALUE |
531 |
|
|
my @kv; |
532 |
|
|
|
533 |
root |
1.79 |
# expires is not http-compliant in the original cookie-spec, |
534 |
|
|
# we support the official date format and some extensions |
535 |
root |
1.72 |
while ( |
536 |
|
|
m{ |
537 |
|
|
\G\s* |
538 |
|
|
(?: |
539 |
root |
1.79 |
expires \s*=\s* ([A-Z][a-z][a-z]+,\ [^,;]+) |
540 |
root |
1.101 |
| ([^=;,[:space:]]+) (?: \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^;,[:space:]]*) ) )? |
541 |
root |
1.72 |
) |
542 |
|
|
}gcxsi |
543 |
|
|
) { |
544 |
|
|
my $name = $2; |
545 |
|
|
my $value = $4; |
546 |
|
|
|
547 |
root |
1.82 |
if (defined $1) { |
548 |
root |
1.72 |
# expires |
549 |
|
|
$name = "expires"; |
550 |
|
|
$value = $1; |
551 |
root |
1.82 |
} elsif (defined $3) { |
552 |
root |
1.72 |
# quoted |
553 |
|
|
$value = $3; |
554 |
|
|
$value =~ s/\\(.)/$1/gs; |
555 |
|
|
} |
556 |
|
|
|
557 |
root |
1.95 |
push @kv, @kv ? lc $name : $name, $value; |
558 |
root |
1.72 |
|
559 |
|
|
last unless /\G\s*;/gc; |
560 |
|
|
} |
561 |
|
|
|
562 |
|
|
last unless @kv; |
563 |
|
|
|
564 |
|
|
my $name = shift @kv; |
565 |
|
|
my %kv = (value => shift @kv, @kv); |
566 |
|
|
|
567 |
root |
1.80 |
if (exists $kv{"max-age"}) { |
568 |
|
|
$kv{_expires} = $anow + delete $kv{"max-age"}; |
569 |
|
|
} elsif (exists $kv{expires}) { |
570 |
|
|
$snow ||= parse_date ($date) || $anow; |
571 |
|
|
$kv{_expires} = $anow + (parse_date (delete $kv{expires}) - $snow); |
572 |
|
|
} else { |
573 |
|
|
delete $kv{_expires}; |
574 |
|
|
} |
575 |
root |
1.72 |
|
576 |
|
|
my $cdom; |
577 |
|
|
my $cpath = (delete $kv{path}) || "/"; |
578 |
|
|
|
579 |
|
|
if (exists $kv{domain}) { |
580 |
|
|
$cdom = delete $kv{domain}; |
581 |
|
|
|
582 |
|
|
$cdom =~ s/^\.?/./; # make sure it starts with a "." |
583 |
|
|
|
584 |
|
|
next if $cdom =~ /\.$/; |
585 |
|
|
|
586 |
|
|
# this is not rfc-like and not netscape-like. go figure. |
587 |
|
|
my $ndots = $cdom =~ y/.//; |
588 |
|
|
next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2); |
589 |
|
|
} else { |
590 |
root |
1.92 |
$cdom = $host; |
591 |
root |
1.72 |
} |
592 |
|
|
|
593 |
|
|
# store it |
594 |
root |
1.73 |
$jar->{version} = 1; |
595 |
root |
1.83 |
$jar->{lc $cdom}{$cpath}{$name} = \%kv; |
596 |
root |
1.72 |
|
597 |
|
|
redo if /\G\s*,/gc; |
598 |
|
|
} |
599 |
|
|
} |
600 |
|
|
|
601 |
root |
1.92 |
############################################################################# |
602 |
|
|
# keepalive/persistent connection cache |
603 |
|
|
|
604 |
|
|
# fetch a connection from the keepalive cache |
605 |
|
|
sub ka_fetch($) { |
606 |
|
|
my $ka_key = shift; |
607 |
|
|
|
608 |
|
|
my $hdl = pop @{ $KA_CACHE{$ka_key} }; # currently we reuse the MOST RECENTLY USED connection |
609 |
|
|
delete $KA_CACHE{$ka_key} |
610 |
|
|
unless @{ $KA_CACHE{$ka_key} }; |
611 |
|
|
|
612 |
|
|
$hdl |
613 |
|
|
} |
614 |
|
|
|
615 |
|
|
sub ka_store($$) { |
616 |
|
|
my ($ka_key, $hdl) = @_; |
617 |
|
|
|
618 |
|
|
my $kaa = $KA_CACHE{$ka_key} ||= []; |
619 |
|
|
|
620 |
|
|
my $destroy = sub { |
621 |
|
|
my @ka = grep $_ != $hdl, @{ $KA_CACHE{$ka_key} }; |
622 |
|
|
|
623 |
|
|
$hdl->destroy; |
624 |
|
|
|
625 |
|
|
@ka |
626 |
|
|
? $KA_CACHE{$ka_key} = \@ka |
627 |
|
|
: delete $KA_CACHE{$ka_key}; |
628 |
|
|
}; |
629 |
|
|
|
630 |
|
|
# on error etc., destroy |
631 |
|
|
$hdl->on_error ($destroy); |
632 |
|
|
$hdl->on_eof ($destroy); |
633 |
|
|
$hdl->on_read ($destroy); |
634 |
|
|
$hdl->timeout ($PERSISTENT_TIMEOUT); |
635 |
|
|
|
636 |
|
|
push @$kaa, $hdl; |
637 |
|
|
shift @$kaa while @$kaa > $MAX_PER_HOST; |
638 |
|
|
} |
639 |
|
|
|
640 |
|
|
############################################################################# |
641 |
|
|
# utilities |
642 |
|
|
|
643 |
root |
1.66 |
# continue to parse $_ for headers and place them into the arg |
644 |
root |
1.92 |
sub _parse_hdr() { |
645 |
root |
1.66 |
my %hdr; |
646 |
|
|
|
647 |
|
|
# things seen, not parsed: |
648 |
|
|
# p3pP="NON CUR OTPi OUR NOR UNI" |
649 |
|
|
|
650 |
|
|
$hdr{lc $1} .= ",$2" |
651 |
|
|
while /\G |
652 |
|
|
([^:\000-\037]*): |
653 |
|
|
[\011\040]* |
654 |
|
|
((?: [^\012]+ | \012[\011\040] )*) |
655 |
|
|
\012 |
656 |
|
|
/gxc; |
657 |
|
|
|
658 |
|
|
/\G$/ |
659 |
|
|
or return; |
660 |
|
|
|
661 |
|
|
# remove the "," prefix we added to all headers above |
662 |
|
|
substr $_, 0, 1, "" |
663 |
|
|
for values %hdr; |
664 |
|
|
|
665 |
|
|
\%hdr |
666 |
|
|
} |
667 |
|
|
|
668 |
root |
1.92 |
############################################################################# |
669 |
|
|
# http_get |
670 |
|
|
|
671 |
root |
1.46 |
our $qr_nlnl = qr{(?<![^\012])\015?\012}; |
672 |
root |
1.34 |
|
673 |
root |
1.41 |
our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; |
674 |
|
|
our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; |
675 |
root |
1.40 |
|
676 |
root |
1.92 |
# maybe it should just become a normal object :/ |
677 |
|
|
|
678 |
|
|
sub _destroy_state(\%) { |
679 |
|
|
my ($state) = @_; |
680 |
|
|
|
681 |
|
|
$state->{handle}->destroy if $state->{handle}; |
682 |
|
|
%$state = (); |
683 |
|
|
} |
684 |
|
|
|
685 |
|
|
sub _error(\%$$) { |
686 |
|
|
my ($state, $cb, $hdr) = @_; |
687 |
|
|
|
688 |
|
|
&_destroy_state ($state); |
689 |
|
|
|
690 |
|
|
$cb->(undef, $hdr); |
691 |
|
|
() |
692 |
|
|
} |
693 |
|
|
|
694 |
elmex |
1.15 |
sub http_request($$@) { |
695 |
root |
1.1 |
my $cb = pop; |
696 |
|
|
my ($method, $url, %arg) = @_; |
697 |
|
|
|
698 |
|
|
my %hdr; |
699 |
|
|
|
700 |
root |
1.40 |
$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" || !exists $arg{tls_ctx}; |
701 |
|
|
$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high"; |
702 |
|
|
|
703 |
root |
1.3 |
$method = uc $method; |
704 |
|
|
|
705 |
root |
1.8 |
if (my $hdr = $arg{headers}) { |
706 |
root |
1.1 |
while (my ($k, $v) = each %$hdr) { |
707 |
|
|
$hdr{lc $k} = $v; |
708 |
|
|
} |
709 |
|
|
} |
710 |
|
|
|
711 |
root |
1.55 |
# pseudo headers for all subsequent responses |
712 |
|
|
my @pseudo = (URL => $url); |
713 |
|
|
push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect}; |
714 |
|
|
|
715 |
root |
1.23 |
my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; |
716 |
root |
1.8 |
|
717 |
root |
1.64 |
return $cb->(undef, { @pseudo, Status => 599, Reason => "Too many redirections" }) |
718 |
root |
1.8 |
if $recurse < 0; |
719 |
|
|
|
720 |
root |
1.102 |
my $proxy = exists $arg{proxy} ? $arg{proxy} : $PROXY; |
721 |
root |
1.1 |
my $timeout = $arg{timeout} || $TIMEOUT; |
722 |
|
|
|
723 |
root |
1.92 |
my ($uscheme, $uauthority, $upath, $query, undef) = # ignore fragment |
724 |
root |
1.100 |
$url =~ m|^([^:]+):(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?$|; |
725 |
root |
1.2 |
|
726 |
root |
1.31 |
$uscheme = lc $uscheme; |
727 |
root |
1.1 |
|
728 |
root |
1.31 |
my $uport = $uscheme eq "http" ? 80 |
729 |
|
|
: $uscheme eq "https" ? 443 |
730 |
root |
1.64 |
: return $cb->(undef, { @pseudo, Status => 599, Reason => "Only http and https URL schemes supported" }); |
731 |
root |
1.13 |
|
732 |
root |
1.31 |
$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x |
733 |
root |
1.64 |
or return $cb->(undef, { @pseudo, Status => 599, Reason => "Unparsable URL" }); |
734 |
root |
1.10 |
|
735 |
root |
1.86 |
my $uhost = lc $1; |
736 |
root |
1.10 |
$uport = $2 if defined $2; |
737 |
|
|
|
738 |
root |
1.53 |
$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost" |
739 |
|
|
unless exists $hdr{host}; |
740 |
root |
1.43 |
|
741 |
root |
1.10 |
$uhost =~ s/^\[(.*)\]$/$1/; |
742 |
root |
1.56 |
$upath .= $query if length $query; |
743 |
root |
1.10 |
|
744 |
|
|
$upath =~ s%^/?%/%; |
745 |
|
|
|
746 |
|
|
# cookie processing |
747 |
|
|
if (my $jar = $arg{cookie_jar}) { |
748 |
root |
1.71 |
my $cookies = cookie_jar_extract $jar, $uscheme, $uhost, $upath; |
749 |
root |
1.70 |
|
750 |
root |
1.71 |
$hdr{cookie} = join "; ", @$cookies |
751 |
|
|
if @$cookies; |
752 |
root |
1.10 |
} |
753 |
root |
1.1 |
|
754 |
root |
1.31 |
my ($rhost, $rport, $rscheme, $rpath); # request host, port, path |
755 |
root |
1.2 |
|
756 |
root |
1.10 |
if ($proxy) { |
757 |
root |
1.38 |
($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy); |
758 |
root |
1.31 |
|
759 |
root |
1.47 |
$rscheme = "http" unless defined $rscheme; |
760 |
|
|
|
761 |
root |
1.31 |
# don't support https requests over https-proxy transport, |
762 |
root |
1.38 |
# can't be done with tls as spec'ed, unless you double-encrypt. |
763 |
root |
1.31 |
$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; |
764 |
root |
1.86 |
|
765 |
|
|
$rhost = lc $rhost; |
766 |
|
|
$rscheme = lc $rscheme; |
767 |
root |
1.10 |
} else { |
768 |
root |
1.31 |
($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); |
769 |
root |
1.2 |
} |
770 |
|
|
|
771 |
root |
1.47 |
# leave out fragment and query string, just a heuristic |
772 |
root |
1.66 |
$hdr{referer} = "$uscheme://$uauthority$upath" unless exists $hdr{referer}; |
773 |
|
|
$hdr{"user-agent"} = $USERAGENT unless exists $hdr{"user-agent"}; |
774 |
root |
1.41 |
|
775 |
root |
1.53 |
$hdr{"content-length"} = length $arg{body} |
776 |
|
|
if length $arg{body} || $method ne "GET"; |
777 |
root |
1.1 |
|
778 |
root |
1.89 |
my $idempotent = $method =~ /^(?:GET|HEAD|PUT|DELETE|OPTIONS|TRACE)$/; |
779 |
|
|
|
780 |
|
|
# default value for keepalive is true iff the request is for an idempotent method |
781 |
root |
1.103 |
my $persistent = exists $arg{persistent} ? !!$arg{persistent} : $idempotent; |
782 |
|
|
my $keepalive = exists $arg{keepalive} ? !!$arg{keepalive} : !$proxy; |
783 |
|
|
my $was_persistent; # true if this is actually a recycled connection |
784 |
root |
1.92 |
|
785 |
|
|
# the key to use in the keepalive cache |
786 |
root |
1.105 |
my $ka_key = "$uscheme\x00$uhost\x00$uport\x00$arg{sessionid}"; |
787 |
root |
1.89 |
|
788 |
root |
1.103 |
$hdr{connection} = ($persistent ? $keepalive ? "keep-alive " : "" : "close ") . "Te"; #1.1 |
789 |
root |
1.68 |
$hdr{te} = "trailers" unless exists $hdr{te}; #1.1 |
790 |
root |
1.66 |
|
791 |
root |
1.11 |
my %state = (connect_guard => 1); |
792 |
|
|
|
793 |
root |
1.88 |
my $ae_error = 595; # connecting |
794 |
root |
1.1 |
|
795 |
root |
1.88 |
# handle actual, non-tunneled, request |
796 |
|
|
my $handle_actual_request = sub { |
797 |
|
|
$ae_error = 596; # request phase |
798 |
|
|
|
799 |
root |
1.92 |
my $hdl = $state{handle}; |
800 |
|
|
|
801 |
|
|
$hdl->starttls ("connect") if $uscheme eq "https" && !exists $hdl->{tls}; |
802 |
root |
1.88 |
|
803 |
|
|
# send request |
804 |
root |
1.92 |
$hdl->push_write ( |
805 |
root |
1.88 |
"$method $rpath HTTP/1.1\015\012" |
806 |
|
|
. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) |
807 |
|
|
. "\015\012" |
808 |
|
|
. (delete $arg{body}) |
809 |
|
|
); |
810 |
|
|
|
811 |
|
|
# return if error occured during push_write() |
812 |
|
|
return unless %state; |
813 |
|
|
|
814 |
root |
1.89 |
# reduce memory usage, save a kitten, also re-use it for the response headers. |
815 |
|
|
%hdr = (); |
816 |
root |
1.88 |
|
817 |
|
|
# status line and headers |
818 |
|
|
$state{read_response} = sub { |
819 |
root |
1.92 |
return unless %state; |
820 |
|
|
|
821 |
root |
1.88 |
for ("$_[1]") { |
822 |
|
|
y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
823 |
|
|
|
824 |
|
|
/^HTTP\/0*([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\012]*) )? \012/gxci |
825 |
root |
1.92 |
or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid server response" }; |
826 |
root |
1.88 |
|
827 |
|
|
# 100 Continue handling |
828 |
|
|
# should not happen as we don't send expect: 100-continue, |
829 |
|
|
# but we handle it just in case. |
830 |
|
|
# since we send the request body regardless, if we get an error |
831 |
|
|
# we are out of-sync, which we currently do NOT handle correctly. |
832 |
|
|
return $state{handle}->push_read (line => $qr_nlnl, $state{read_response}) |
833 |
|
|
if $2 eq 100; |
834 |
|
|
|
835 |
|
|
push @pseudo, |
836 |
|
|
HTTPVersion => $1, |
837 |
|
|
Status => $2, |
838 |
|
|
Reason => $3, |
839 |
|
|
; |
840 |
root |
1.1 |
|
841 |
root |
1.92 |
my $hdr = _parse_hdr |
842 |
|
|
or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Garbled response headers" }; |
843 |
root |
1.77 |
|
844 |
root |
1.88 |
%hdr = (%$hdr, @pseudo); |
845 |
|
|
} |
846 |
root |
1.82 |
|
847 |
root |
1.88 |
# redirect handling |
848 |
|
|
# microsoft and other shitheads don't give a shit for following standards, |
849 |
|
|
# try to support some common forms of broken Location headers. |
850 |
|
|
if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { |
851 |
|
|
$hdr{location} =~ s/^\.\/+//; |
852 |
|
|
|
853 |
|
|
my $url = "$rscheme://$uhost:$uport"; |
854 |
|
|
|
855 |
|
|
unless ($hdr{location} =~ s/^\///) { |
856 |
|
|
$url .= $upath; |
857 |
|
|
$url =~ s/\/[^\/]*$//; |
858 |
root |
1.82 |
} |
859 |
|
|
|
860 |
root |
1.88 |
$hdr{location} = "$url/$hdr{location}"; |
861 |
|
|
} |
862 |
root |
1.82 |
|
863 |
root |
1.88 |
my $redirect; |
864 |
root |
1.82 |
|
865 |
root |
1.88 |
if ($recurse) { |
866 |
|
|
my $status = $hdr{Status}; |
867 |
root |
1.82 |
|
868 |
root |
1.88 |
# industry standard is to redirect POST as GET for |
869 |
|
|
# 301, 302 and 303, in contrast to HTTP/1.0 and 1.1. |
870 |
|
|
# also, the UA should ask the user for 301 and 307 and POST, |
871 |
|
|
# industry standard seems to be to simply follow. |
872 |
|
|
# we go with the industry standard. |
873 |
|
|
if ($status == 301 or $status == 302 or $status == 303) { |
874 |
|
|
# HTTP/1.1 is unclear on how to mutate the method |
875 |
|
|
$method = "GET" unless $method eq "HEAD"; |
876 |
|
|
$redirect = 1; |
877 |
|
|
} elsif ($status == 307) { |
878 |
|
|
$redirect = 1; |
879 |
root |
1.82 |
} |
880 |
root |
1.88 |
} |
881 |
root |
1.82 |
|
882 |
root |
1.103 |
my $finish = sub { # ($data, $err_status, $err_reason[, $persistent]) |
883 |
root |
1.92 |
if ($state{handle}) { |
884 |
|
|
# handle keepalive |
885 |
|
|
if ( |
886 |
root |
1.103 |
$persistent |
887 |
root |
1.92 |
&& $_[3] |
888 |
|
|
&& ($hdr{HTTPVersion} < 1.1 |
889 |
|
|
? $hdr{connection} =~ /\bkeep-?alive\b/i |
890 |
|
|
: $hdr{connection} !~ /\bclose\b/i) |
891 |
|
|
) { |
892 |
|
|
ka_store $ka_key, delete $state{handle}; |
893 |
|
|
} else { |
894 |
|
|
# no keepalive, destroy the handle |
895 |
|
|
$state{handle}->destroy; |
896 |
|
|
} |
897 |
|
|
} |
898 |
root |
1.82 |
|
899 |
root |
1.88 |
%state = (); |
900 |
root |
1.82 |
|
901 |
root |
1.88 |
if (defined $_[1]) { |
902 |
|
|
$hdr{OrigStatus} = $hdr{Status}; $hdr{Status} = $_[1]; |
903 |
|
|
$hdr{OrigReason} = $hdr{Reason}; $hdr{Reason} = $_[2]; |
904 |
|
|
} |
905 |
root |
1.82 |
|
906 |
root |
1.88 |
# set-cookie processing |
907 |
|
|
if ($arg{cookie_jar}) { |
908 |
|
|
cookie_jar_set_cookie $arg{cookie_jar}, $hdr{"set-cookie"}, $uhost, $hdr{date}; |
909 |
|
|
} |
910 |
root |
1.82 |
|
911 |
root |
1.88 |
if ($redirect && exists $hdr{location}) { |
912 |
|
|
# we ignore any errors, as it is very common to receive |
913 |
|
|
# Content-Length != 0 but no actual body |
914 |
|
|
# we also access %hdr, as $_[1] might be an erro |
915 |
root |
1.103 |
$state{recurse} = |
916 |
|
|
http_request ( |
917 |
|
|
$method => $hdr{location}, |
918 |
|
|
%arg, |
919 |
|
|
recurse => $recurse - 1, |
920 |
|
|
Redirect => [$_[0], \%hdr], |
921 |
|
|
sub { |
922 |
|
|
%state = (); |
923 |
|
|
&$cb |
924 |
|
|
}, |
925 |
|
|
); |
926 |
root |
1.88 |
} else { |
927 |
|
|
$cb->($_[0], \%hdr); |
928 |
|
|
} |
929 |
|
|
}; |
930 |
root |
1.82 |
|
931 |
root |
1.88 |
$ae_error = 597; # body phase |
932 |
root |
1.82 |
|
933 |
root |
1.91 |
my $chunked = $hdr{"transfer-encoding"} =~ /\bchunked\b/i; # not quite correct... |
934 |
|
|
|
935 |
|
|
my $len = $chunked ? undef : $hdr{"content-length"}; |
936 |
root |
1.82 |
|
937 |
root |
1.88 |
# body handling, many different code paths |
938 |
|
|
# - no body expected |
939 |
|
|
# - want_body_handle |
940 |
|
|
# - te chunked |
941 |
|
|
# - 2x length known (with or without on_body) |
942 |
|
|
# - 2x length not known (with or without on_body) |
943 |
|
|
if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { |
944 |
|
|
$finish->(undef, 598 => "Request cancelled by on_header"); |
945 |
|
|
} elsif ( |
946 |
|
|
$hdr{Status} =~ /^(?:1..|204|205|304)$/ |
947 |
|
|
or $method eq "HEAD" |
948 |
|
|
or (defined $len && $len == 0) # == 0, not !, because "0 " is true |
949 |
|
|
) { |
950 |
|
|
# no body |
951 |
|
|
$finish->("", undef, undef, 1); |
952 |
|
|
|
953 |
|
|
} elsif (!$redirect && $arg{want_body_handle}) { |
954 |
|
|
$_[0]->on_eof (undef); |
955 |
|
|
$_[0]->on_error (undef); |
956 |
|
|
$_[0]->on_read (undef); |
957 |
|
|
|
958 |
|
|
$finish->(delete $state{handle}); |
959 |
|
|
|
960 |
root |
1.91 |
} elsif ($chunked) { |
961 |
root |
1.88 |
my $cl = 0; |
962 |
root |
1.92 |
my $body = ""; |
963 |
root |
1.88 |
my $on_body = $arg{on_body} || sub { $body .= shift; 1 }; |
964 |
|
|
|
965 |
|
|
$state{read_chunk} = sub { |
966 |
|
|
$_[1] =~ /^([0-9a-fA-F]+)/ |
967 |
|
|
or $finish->(undef, $ae_error => "Garbled chunked transfer encoding"); |
968 |
root |
1.82 |
|
969 |
root |
1.88 |
my $len = hex $1; |
970 |
root |
1.82 |
|
971 |
root |
1.88 |
if ($len) { |
972 |
|
|
$cl += $len; |
973 |
root |
1.82 |
|
974 |
root |
1.88 |
$_[0]->push_read (chunk => $len, sub { |
975 |
|
|
$on_body->($_[1], \%hdr) |
976 |
|
|
or return $finish->(undef, 598 => "Request cancelled by on_body"); |
977 |
root |
1.82 |
|
978 |
root |
1.88 |
$_[0]->push_read (line => sub { |
979 |
|
|
length $_[1] |
980 |
|
|
and return $finish->(undef, $ae_error => "Garbled chunked transfer encoding"); |
981 |
|
|
$_[0]->push_read (line => $state{read_chunk}); |
982 |
root |
1.82 |
}); |
983 |
root |
1.88 |
}); |
984 |
|
|
} else { |
985 |
|
|
$hdr{"content-length"} ||= $cl; |
986 |
root |
1.84 |
|
987 |
root |
1.88 |
$_[0]->push_read (line => $qr_nlnl, sub { |
988 |
|
|
if (length $_[1]) { |
989 |
|
|
for ("$_[1]") { |
990 |
|
|
y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
991 |
root |
1.84 |
|
992 |
root |
1.92 |
my $hdr = _parse_hdr |
993 |
root |
1.88 |
or return $finish->(undef, $ae_error => "Garbled response trailers"); |
994 |
root |
1.84 |
|
995 |
root |
1.88 |
%hdr = (%hdr, %$hdr); |
996 |
|
|
} |
997 |
|
|
} |
998 |
root |
1.84 |
|
999 |
root |
1.88 |
$finish->($body, undef, undef, 1); |
1000 |
root |
1.84 |
}); |
1001 |
|
|
} |
1002 |
root |
1.88 |
}; |
1003 |
|
|
|
1004 |
|
|
$_[0]->push_read (line => $state{read_chunk}); |
1005 |
|
|
|
1006 |
|
|
} elsif ($arg{on_body}) { |
1007 |
|
|
if (defined $len) { |
1008 |
|
|
$_[0]->on_read (sub { |
1009 |
|
|
$len -= length $_[0]{rbuf}; |
1010 |
|
|
|
1011 |
|
|
$arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
1012 |
|
|
or return $finish->(undef, 598 => "Request cancelled by on_body"); |
1013 |
|
|
|
1014 |
|
|
$len > 0 |
1015 |
|
|
or $finish->("", undef, undef, 1); |
1016 |
|
|
}); |
1017 |
root |
1.84 |
} else { |
1018 |
root |
1.88 |
$_[0]->on_eof (sub { |
1019 |
|
|
$finish->(""); |
1020 |
|
|
}); |
1021 |
|
|
$_[0]->on_read (sub { |
1022 |
|
|
$arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
1023 |
|
|
or $finish->(undef, 598 => "Request cancelled by on_body"); |
1024 |
|
|
}); |
1025 |
|
|
} |
1026 |
|
|
} else { |
1027 |
|
|
$_[0]->on_eof (undef); |
1028 |
root |
1.82 |
|
1029 |
root |
1.88 |
if (defined $len) { |
1030 |
|
|
$_[0]->on_read (sub { |
1031 |
|
|
$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), undef, undef, 1) |
1032 |
|
|
if $len <= length $_[0]{rbuf}; |
1033 |
|
|
}); |
1034 |
|
|
} else { |
1035 |
|
|
$_[0]->on_error (sub { |
1036 |
|
|
($! == Errno::EPIPE || !$!) |
1037 |
|
|
? $finish->(delete $_[0]{rbuf}) |
1038 |
|
|
: $finish->(undef, $ae_error => $_[2]); |
1039 |
|
|
}); |
1040 |
|
|
$_[0]->on_read (sub { }); |
1041 |
root |
1.82 |
} |
1042 |
root |
1.88 |
} |
1043 |
|
|
}; |
1044 |
root |
1.82 |
|
1045 |
root |
1.92 |
# if keepalive is enabled, then the server closing the connection |
1046 |
|
|
# before a response can happen legally - we retry on idempotent methods. |
1047 |
root |
1.103 |
if ($was_persistent && $idempotent) { |
1048 |
root |
1.92 |
my $old_eof = $hdl->{on_eof}; |
1049 |
|
|
$hdl->{on_eof} = sub { |
1050 |
|
|
_destroy_state %state; |
1051 |
|
|
|
1052 |
root |
1.103 |
%state = (); |
1053 |
|
|
$state{recurse} = |
1054 |
|
|
http_request ( |
1055 |
|
|
$method => $url, |
1056 |
|
|
%arg, |
1057 |
|
|
keepalive => 0, |
1058 |
|
|
sub { |
1059 |
|
|
%state = (); |
1060 |
|
|
&$cb |
1061 |
|
|
} |
1062 |
|
|
); |
1063 |
root |
1.92 |
}; |
1064 |
|
|
$hdl->on_read (sub { |
1065 |
|
|
return unless %state; |
1066 |
|
|
|
1067 |
|
|
# as soon as we receive something, a connection close |
1068 |
|
|
# once more becomes a hard error |
1069 |
|
|
$hdl->{on_eof} = $old_eof; |
1070 |
|
|
$hdl->push_read (line => $qr_nlnl, $state{read_response}); |
1071 |
|
|
}); |
1072 |
|
|
} else { |
1073 |
|
|
$hdl->push_read (line => $qr_nlnl, $state{read_response}); |
1074 |
|
|
} |
1075 |
|
|
}; |
1076 |
|
|
|
1077 |
|
|
my $prepare_handle = sub { |
1078 |
|
|
my ($hdl) = $state{handle}; |
1079 |
|
|
|
1080 |
|
|
$hdl->on_error (sub { |
1081 |
|
|
_error %state, $cb, { @pseudo, Status => $ae_error, Reason => $_[2] }; |
1082 |
|
|
}); |
1083 |
|
|
$hdl->on_eof (sub { |
1084 |
|
|
_error %state, $cb, { @pseudo, Status => $ae_error, Reason => "Unexpected end-of-file" }; |
1085 |
|
|
}); |
1086 |
root |
1.103 |
$hdl->timeout_reset; |
1087 |
|
|
$hdl->timeout ($timeout); |
1088 |
root |
1.88 |
}; |
1089 |
root |
1.82 |
|
1090 |
root |
1.92 |
# connected to proxy (or origin server) |
1091 |
root |
1.88 |
my $connect_cb = sub { |
1092 |
root |
1.92 |
my $fh = shift |
1093 |
|
|
or return _error %state, $cb, { @pseudo, Status => $ae_error, Reason => "$!" }; |
1094 |
root |
1.44 |
|
1095 |
root |
1.88 |
return unless delete $state{connect_guard}; |
1096 |
root |
1.11 |
|
1097 |
root |
1.88 |
# get handle |
1098 |
|
|
$state{handle} = new AnyEvent::Handle |
1099 |
root |
1.92 |
%{ $arg{handle_params} }, |
1100 |
|
|
fh => $fh, |
1101 |
|
|
peername => $uhost, |
1102 |
root |
1.88 |
tls_ctx => $arg{tls_ctx}, |
1103 |
|
|
; |
1104 |
root |
1.11 |
|
1105 |
root |
1.92 |
$prepare_handle->(); |
1106 |
root |
1.1 |
|
1107 |
root |
1.92 |
#$state{handle}->starttls ("connect") if $rscheme eq "https"; |
1108 |
root |
1.88 |
|
1109 |
|
|
# now handle proxy-CONNECT method |
1110 |
|
|
if ($proxy && $uscheme eq "https") { |
1111 |
|
|
# oh dear, we have to wrap it into a connect request |
1112 |
|
|
|
1113 |
|
|
# maybe re-use $uauthority with patched port? |
1114 |
|
|
$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012\015\012"); |
1115 |
|
|
$state{handle}->push_read (line => $qr_nlnl, sub { |
1116 |
|
|
$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix |
1117 |
root |
1.92 |
or return _error %state, $cb, { @pseudo, Status => 599, Reason => "Invalid proxy connect response ($_[1])" }; |
1118 |
root |
1.88 |
|
1119 |
|
|
if ($2 == 200) { |
1120 |
|
|
$rpath = $upath; |
1121 |
|
|
$handle_actual_request->(); |
1122 |
|
|
} else { |
1123 |
root |
1.92 |
_error %state, $cb, { @pseudo, Status => $2, Reason => $3 }; |
1124 |
root |
1.88 |
} |
1125 |
|
|
}); |
1126 |
|
|
} else { |
1127 |
|
|
$handle_actual_request->(); |
1128 |
|
|
} |
1129 |
|
|
}; |
1130 |
|
|
|
1131 |
|
|
_get_slot $uhost, sub { |
1132 |
|
|
$state{slot_guard} = shift; |
1133 |
root |
1.64 |
|
1134 |
root |
1.88 |
return unless $state{connect_guard}; |
1135 |
root |
1.64 |
|
1136 |
root |
1.92 |
# try to use an existing keepalive connection, but only if we, ourselves, plan |
1137 |
|
|
# on a keepalive request (in theory, this should be a separate config option). |
1138 |
root |
1.103 |
if ($persistent && $KA_CACHE{$ka_key}) { |
1139 |
|
|
$was_persistent = 1; |
1140 |
|
|
|
1141 |
root |
1.92 |
$state{handle} = ka_fetch $ka_key; |
1142 |
root |
1.103 |
$state{handle}->destroyed |
1143 |
root |
1.107 |
and die "AnyEvent::HTTP: unexpectedly got a destructed handle (1), please report.";#d# |
1144 |
root |
1.92 |
$prepare_handle->(); |
1145 |
root |
1.103 |
$state{handle}->destroyed |
1146 |
root |
1.107 |
and die "AnyEvent::HTTP: unexpectedly got a destructed handle (2), please report.";#d# |
1147 |
root |
1.92 |
$handle_actual_request->(); |
1148 |
|
|
|
1149 |
|
|
} else { |
1150 |
|
|
my $tcp_connect = $arg{tcp_connect} |
1151 |
|
|
|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect }; |
1152 |
root |
1.57 |
|
1153 |
root |
1.92 |
$state{connect_guard} = $tcp_connect->($rhost, $rport, $connect_cb, $arg{on_prepare} || sub { $timeout }); |
1154 |
|
|
} |
1155 |
root |
1.1 |
}; |
1156 |
|
|
|
1157 |
root |
1.92 |
defined wantarray && AnyEvent::Util::guard { _destroy_state %state } |
1158 |
root |
1.1 |
} |
1159 |
|
|
|
1160 |
elmex |
1.15 |
sub http_get($@) { |
1161 |
root |
1.1 |
unshift @_, "GET"; |
1162 |
|
|
&http_request |
1163 |
|
|
} |
1164 |
|
|
|
1165 |
elmex |
1.15 |
sub http_head($@) { |
1166 |
root |
1.4 |
unshift @_, "HEAD"; |
1167 |
|
|
&http_request |
1168 |
|
|
} |
1169 |
|
|
|
1170 |
elmex |
1.15 |
sub http_post($$@) { |
1171 |
root |
1.22 |
my $url = shift; |
1172 |
|
|
unshift @_, "POST", $url, "body"; |
1173 |
root |
1.3 |
&http_request |
1174 |
|
|
} |
1175 |
|
|
|
1176 |
root |
1.9 |
=back |
1177 |
|
|
|
1178 |
root |
1.55 |
=head2 DNS CACHING |
1179 |
|
|
|
1180 |
|
|
AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for |
1181 |
|
|
the actual connection, which in turn uses AnyEvent::DNS to resolve |
1182 |
|
|
hostnames. The latter is a simple stub resolver and does no caching |
1183 |
|
|
on its own. If you want DNS caching, you currently have to provide |
1184 |
|
|
your own default resolver (by storing a suitable resolver object in |
1185 |
root |
1.92 |
C<$AnyEvent::DNS::RESOLVER>) or your own C<tcp_connect> callback. |
1186 |
root |
1.55 |
|
1187 |
root |
1.2 |
=head2 GLOBAL FUNCTIONS AND VARIABLES |
1188 |
root |
1.1 |
|
1189 |
|
|
=over 4 |
1190 |
|
|
|
1191 |
root |
1.2 |
=item AnyEvent::HTTP::set_proxy "proxy-url" |
1192 |
|
|
|
1193 |
|
|
Sets the default proxy server to use. The proxy-url must begin with a |
1194 |
root |
1.92 |
string of the form C<http://host:port>, croaks otherwise. |
1195 |
root |
1.52 |
|
1196 |
|
|
To clear an already-set proxy, use C<undef>. |
1197 |
root |
1.2 |
|
1198 |
root |
1.102 |
When AnyEvent::HTTP is laoded for the first time it will query the |
1199 |
|
|
default proxy from the operating system, currently by looking at |
1200 |
|
|
C<$ENV{http_proxy>}. |
1201 |
|
|
|
1202 |
root |
1.80 |
=item AnyEvent::HTTP::cookie_jar_expire $jar[, $session_end] |
1203 |
|
|
|
1204 |
|
|
Remove all cookies from the cookie jar that have been expired. If |
1205 |
|
|
C<$session_end> is given and true, then additionally remove all session |
1206 |
|
|
cookies. |
1207 |
|
|
|
1208 |
|
|
You should call this function (with a true C<$session_end>) before you |
1209 |
|
|
save cookies to disk, and you should call this function after loading them |
1210 |
|
|
again. If you have a long-running program you can additonally call this |
1211 |
|
|
function from time to time. |
1212 |
|
|
|
1213 |
|
|
A cookie jar is initially an empty hash-reference that is managed by this |
1214 |
|
|
module. It's format is subject to change, but currently it is like this: |
1215 |
|
|
|
1216 |
|
|
The key C<version> has to contain C<1>, otherwise the hash gets |
1217 |
|
|
emptied. All other keys are hostnames or IP addresses pointing to |
1218 |
|
|
hash-references. The key for these inner hash references is the |
1219 |
|
|
server path for which this cookie is meant, and the values are again |
1220 |
|
|
hash-references. The keys of those hash-references is the cookie name, and |
1221 |
|
|
the value, you guessed it, is another hash-reference, this time with the |
1222 |
|
|
key-value pairs from the cookie, except for C<expires> and C<max-age>, |
1223 |
|
|
which have been replaced by a C<_expires> key that contains the cookie |
1224 |
|
|
expiry timestamp. |
1225 |
|
|
|
1226 |
|
|
Here is an example of a cookie jar with a single cookie, so you have a |
1227 |
|
|
chance of understanding the above paragraph: |
1228 |
|
|
|
1229 |
|
|
{ |
1230 |
|
|
version => 1, |
1231 |
|
|
"10.0.0.1" => { |
1232 |
|
|
"/" => { |
1233 |
|
|
"mythweb_id" => { |
1234 |
|
|
_expires => 1293917923, |
1235 |
|
|
value => "ooRung9dThee3ooyXooM1Ohm", |
1236 |
|
|
}, |
1237 |
|
|
}, |
1238 |
|
|
}, |
1239 |
|
|
} |
1240 |
|
|
|
1241 |
root |
1.61 |
=item $date = AnyEvent::HTTP::format_date $timestamp |
1242 |
|
|
|
1243 |
|
|
Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP |
1244 |
|
|
Date (RFC 2616). |
1245 |
|
|
|
1246 |
|
|
=item $timestamp = AnyEvent::HTTP::parse_date $date |
1247 |
|
|
|
1248 |
root |
1.79 |
Takes a HTTP Date (RFC 2616) or a Cookie date (netscape cookie spec) or a |
1249 |
|
|
bunch of minor variations of those, and returns the corresponding POSIX |
1250 |
|
|
timestamp, or C<undef> if the date cannot be parsed. |
1251 |
root |
1.61 |
|
1252 |
root |
1.3 |
=item $AnyEvent::HTTP::MAX_RECURSE |
1253 |
root |
1.1 |
|
1254 |
root |
1.3 |
The default value for the C<recurse> request parameter (default: C<10>). |
1255 |
root |
1.1 |
|
1256 |
root |
1.92 |
=item $AnyEvent::HTTP::TIMEOUT |
1257 |
|
|
|
1258 |
|
|
The default timeout for conenction operations (default: C<300>). |
1259 |
|
|
|
1260 |
root |
1.1 |
=item $AnyEvent::HTTP::USERAGENT |
1261 |
|
|
|
1262 |
|
|
The default value for the C<User-Agent> header (the default is |
1263 |
root |
1.40 |
C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). |
1264 |
root |
1.1 |
|
1265 |
root |
1.43 |
=item $AnyEvent::HTTP::MAX_PER_HOST |
1266 |
root |
1.1 |
|
1267 |
root |
1.47 |
The maximum number of concurrent connections to the same host (identified |
1268 |
root |
1.43 |
by the hostname). If the limit is exceeded, then the additional requests |
1269 |
root |
1.92 |
are queued until previous connections are closed. Both persistent and |
1270 |
|
|
non-persistent connections are counted in this limit. |
1271 |
root |
1.1 |
|
1272 |
root |
1.43 |
The default value for this is C<4>, and it is highly advisable to not |
1273 |
root |
1.92 |
increase it much. |
1274 |
|
|
|
1275 |
|
|
For comparison: the RFC's recommend 4 non-persistent or 2 persistent |
1276 |
|
|
connections, older browsers used 2, newers (such as firefox 3) typically |
1277 |
|
|
use 6, and Opera uses 8 because like, they have the fastest browser and |
1278 |
|
|
give a shit for everybody else on the planet. |
1279 |
|
|
|
1280 |
|
|
=item $AnyEvent::HTTP::PERSISTENT_TIMEOUT |
1281 |
|
|
|
1282 |
|
|
The time after which idle persistent conenctions get closed by |
1283 |
|
|
AnyEvent::HTTP (default: C<3>). |
1284 |
root |
1.3 |
|
1285 |
root |
1.14 |
=item $AnyEvent::HTTP::ACTIVE |
1286 |
|
|
|
1287 |
|
|
The number of active connections. This is not the number of currently |
1288 |
|
|
running requests, but the number of currently open and non-idle TCP |
1289 |
root |
1.92 |
connections. This number can be useful for load-leveling. |
1290 |
root |
1.14 |
|
1291 |
root |
1.1 |
=back |
1292 |
|
|
|
1293 |
|
|
=cut |
1294 |
|
|
|
1295 |
root |
1.61 |
our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec); |
1296 |
|
|
our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat); |
1297 |
|
|
|
1298 |
|
|
sub format_date($) { |
1299 |
|
|
my ($time) = @_; |
1300 |
|
|
|
1301 |
|
|
# RFC 822/1123 format |
1302 |
|
|
my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time; |
1303 |
|
|
|
1304 |
|
|
sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT", |
1305 |
|
|
$weekday[$wday], $mday, $month[$mon], $year + 1900, |
1306 |
|
|
$H, $M, $S; |
1307 |
|
|
} |
1308 |
|
|
|
1309 |
|
|
sub parse_date($) { |
1310 |
|
|
my ($date) = @_; |
1311 |
|
|
|
1312 |
|
|
my ($d, $m, $y, $H, $M, $S); |
1313 |
|
|
|
1314 |
root |
1.79 |
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$/) { |
1315 |
root |
1.70 |
# RFC 822/1123, required by RFC 2616 (with " ") |
1316 |
|
|
# cookie dates (with "-") |
1317 |
|
|
|
1318 |
root |
1.61 |
($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6); |
1319 |
|
|
|
1320 |
root |
1.79 |
} elsif ($date =~ /^[A-Z][a-z][a-z]+, ([0-9][0-9]?)-([A-Z][a-z][a-z])-([0-9][0-9]) ([0-9][0-9]?):([0-9][0-9]?):([0-9][0-9]?) GMT$/) { |
1321 |
root |
1.61 |
# RFC 850 |
1322 |
|
|
($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6); |
1323 |
|
|
|
1324 |
root |
1.79 |
} 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])$/) { |
1325 |
root |
1.61 |
# ISO C's asctime |
1326 |
|
|
($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5); |
1327 |
|
|
} |
1328 |
|
|
# other formats fail in the loop below |
1329 |
|
|
|
1330 |
|
|
for (0..11) { |
1331 |
|
|
if ($m eq $month[$_]) { |
1332 |
|
|
require Time::Local; |
1333 |
|
|
return Time::Local::timegm ($S, $M, $H, $d, $_, $y); |
1334 |
|
|
} |
1335 |
|
|
} |
1336 |
|
|
|
1337 |
|
|
undef |
1338 |
|
|
} |
1339 |
|
|
|
1340 |
root |
1.2 |
sub set_proxy($) { |
1341 |
root |
1.52 |
if (length $_[0]) { |
1342 |
root |
1.92 |
$_[0] =~ m%^(http):// ([^:/]+) (?: : (\d*) )?%ix |
1343 |
root |
1.52 |
or Carp::croak "$_[0]: invalid proxy URL"; |
1344 |
|
|
$PROXY = [$2, $3 || 3128, $1] |
1345 |
|
|
} else { |
1346 |
|
|
undef $PROXY; |
1347 |
|
|
} |
1348 |
root |
1.2 |
} |
1349 |
|
|
|
1350 |
|
|
# initialise proxy from environment |
1351 |
root |
1.52 |
eval { |
1352 |
|
|
set_proxy $ENV{http_proxy}; |
1353 |
|
|
}; |
1354 |
root |
1.2 |
|
1355 |
root |
1.93 |
=head2 SHOWCASE |
1356 |
|
|
|
1357 |
|
|
This section contaisn some more elaborate "real-world" examples or code |
1358 |
|
|
snippets. |
1359 |
|
|
|
1360 |
|
|
=head2 HTTP/1.1 FILE DOWNLOAD |
1361 |
|
|
|
1362 |
root |
1.96 |
Downloading files with HTTP can be quite tricky, especially when something |
1363 |
root |
1.98 |
goes wrong and you want to resume. |
1364 |
root |
1.93 |
|
1365 |
|
|
Here is a function that initiates and resumes a download. It uses the |
1366 |
|
|
last modified time to check for file content changes, and works with many |
1367 |
|
|
HTTP/1.0 servers as well, and usually falls back to a complete re-download |
1368 |
|
|
on older servers. |
1369 |
|
|
|
1370 |
|
|
It calls the completion callback with either C<undef>, which means a |
1371 |
|
|
nonretryable error occured, C<0> when the download was partial and should |
1372 |
|
|
be retried, and C<1> if it was successful. |
1373 |
|
|
|
1374 |
|
|
use AnyEvent::HTTP; |
1375 |
|
|
|
1376 |
|
|
sub download($$$) { |
1377 |
|
|
my ($url, $file, $cb) = @_; |
1378 |
|
|
|
1379 |
|
|
open my $fh, "+<", $file |
1380 |
|
|
or die "$file: $!"; |
1381 |
|
|
|
1382 |
|
|
my %hdr; |
1383 |
|
|
my $ofs = 0; |
1384 |
|
|
|
1385 |
|
|
warn stat $fh; |
1386 |
|
|
warn -s _; |
1387 |
|
|
if (stat $fh and -s _) { |
1388 |
|
|
$ofs = -s _; |
1389 |
root |
1.107 |
warn "-s is ", $ofs; |
1390 |
root |
1.93 |
$hdr{"if-unmodified-since"} = AnyEvent::HTTP::format_date +(stat _)[9]; |
1391 |
|
|
$hdr{"range"} = "bytes=$ofs-"; |
1392 |
|
|
} |
1393 |
|
|
|
1394 |
|
|
http_get $url, |
1395 |
|
|
headers => \%hdr, |
1396 |
|
|
on_header => sub { |
1397 |
|
|
my ($hdr) = @_; |
1398 |
|
|
|
1399 |
|
|
if ($hdr->{Status} == 200 && $ofs) { |
1400 |
|
|
# resume failed |
1401 |
|
|
truncate $fh, $ofs = 0; |
1402 |
|
|
} |
1403 |
|
|
|
1404 |
|
|
sysseek $fh, $ofs, 0; |
1405 |
|
|
|
1406 |
|
|
1 |
1407 |
|
|
}, |
1408 |
|
|
on_body => sub { |
1409 |
|
|
my ($data, $hdr) = @_; |
1410 |
|
|
|
1411 |
|
|
if ($hdr->{Status} =~ /^2/) { |
1412 |
|
|
length $data == syswrite $fh, $data |
1413 |
|
|
or return; # abort on write errors |
1414 |
|
|
} |
1415 |
|
|
|
1416 |
|
|
1 |
1417 |
|
|
}, |
1418 |
|
|
sub { |
1419 |
|
|
my (undef, $hdr) = @_; |
1420 |
|
|
|
1421 |
|
|
my $status = $hdr->{Status}; |
1422 |
|
|
|
1423 |
|
|
if (my $time = AnyEvent::HTTP::parse_date $hdr->{"last-modified"}) { |
1424 |
|
|
utime $fh, $time, $time; |
1425 |
|
|
} |
1426 |
|
|
|
1427 |
|
|
if ($status == 200 || $status == 206 || $status == 416) { |
1428 |
|
|
# download ok || resume ok || file already fully downloaded |
1429 |
|
|
$cb->(1, $hdr); |
1430 |
|
|
|
1431 |
|
|
} elsif ($status == 412) { |
1432 |
|
|
# file has changed while resuming, delete and retry |
1433 |
|
|
unlink $file; |
1434 |
|
|
$cb->(0, $hdr); |
1435 |
|
|
|
1436 |
|
|
} elsif ($status == 500 or $status == 503 or $status =~ /^59/) { |
1437 |
|
|
# retry later |
1438 |
|
|
$cb->(0, $hdr); |
1439 |
|
|
|
1440 |
|
|
} else { |
1441 |
|
|
$cb->(undef, $hdr); |
1442 |
|
|
} |
1443 |
|
|
} |
1444 |
|
|
; |
1445 |
|
|
} |
1446 |
|
|
|
1447 |
|
|
download "http://server/somelargefile", "/tmp/somelargefile", sub { |
1448 |
|
|
if ($_[0]) { |
1449 |
|
|
print "OK!\n"; |
1450 |
|
|
} elsif (defined $_[0]) { |
1451 |
|
|
print "please retry later\n"; |
1452 |
|
|
} else { |
1453 |
|
|
print "ERROR\n"; |
1454 |
|
|
} |
1455 |
|
|
}; |
1456 |
|
|
|
1457 |
|
|
=head3 SOCKS PROXIES |
1458 |
root |
1.60 |
|
1459 |
|
|
Socks proxies are not directly supported by AnyEvent::HTTP. You can |
1460 |
|
|
compile your perl to support socks, or use an external program such as |
1461 |
|
|
F<socksify> (dante) or F<tsocks> to make your program use a socks proxy |
1462 |
|
|
transparently. |
1463 |
|
|
|
1464 |
|
|
Alternatively, for AnyEvent::HTTP only, you can use your own |
1465 |
|
|
C<tcp_connect> function that does the proxy handshake - here is an example |
1466 |
|
|
that works with socks4a proxies: |
1467 |
|
|
|
1468 |
|
|
use Errno; |
1469 |
|
|
use AnyEvent::Util; |
1470 |
|
|
use AnyEvent::Socket; |
1471 |
|
|
use AnyEvent::Handle; |
1472 |
|
|
|
1473 |
|
|
# host, port and username of/for your socks4a proxy |
1474 |
|
|
my $socks_host = "10.0.0.23"; |
1475 |
|
|
my $socks_port = 9050; |
1476 |
|
|
my $socks_user = ""; |
1477 |
|
|
|
1478 |
|
|
sub socks4a_connect { |
1479 |
|
|
my ($host, $port, $connect_cb, $prepare_cb) = @_; |
1480 |
|
|
|
1481 |
|
|
my $hdl = new AnyEvent::Handle |
1482 |
|
|
connect => [$socks_host, $socks_port], |
1483 |
|
|
on_prepare => sub { $prepare_cb->($_[0]{fh}) }, |
1484 |
|
|
on_error => sub { $connect_cb->() }, |
1485 |
|
|
; |
1486 |
|
|
|
1487 |
|
|
$hdl->push_write (pack "CCnNZ*Z*", 4, 1, $port, 1, $socks_user, $host); |
1488 |
|
|
|
1489 |
|
|
$hdl->push_read (chunk => 8, sub { |
1490 |
|
|
my ($hdl, $chunk) = @_; |
1491 |
|
|
my ($status, $port, $ipn) = unpack "xCna4", $chunk; |
1492 |
|
|
|
1493 |
|
|
if ($status == 0x5a) { |
1494 |
|
|
$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port"); |
1495 |
|
|
} else { |
1496 |
|
|
$! = Errno::ENXIO; $connect_cb->(); |
1497 |
|
|
} |
1498 |
|
|
}); |
1499 |
|
|
|
1500 |
|
|
$hdl |
1501 |
|
|
} |
1502 |
|
|
|
1503 |
|
|
Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s, |
1504 |
|
|
possibly after switching off other proxy types: |
1505 |
|
|
|
1506 |
|
|
AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies |
1507 |
|
|
|
1508 |
|
|
http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub { |
1509 |
|
|
my ($data, $headers) = @_; |
1510 |
|
|
... |
1511 |
|
|
}; |
1512 |
|
|
|
1513 |
root |
1.1 |
=head1 SEE ALSO |
1514 |
|
|
|
1515 |
|
|
L<AnyEvent>. |
1516 |
|
|
|
1517 |
|
|
=head1 AUTHOR |
1518 |
|
|
|
1519 |
root |
1.18 |
Marc Lehmann <schmorp@schmorp.de> |
1520 |
|
|
http://home.schmorp.de/ |
1521 |
root |
1.1 |
|
1522 |
root |
1.36 |
With many thanks to Дмитрий Шалашов, who provided countless |
1523 |
|
|
testcases and bugreports. |
1524 |
|
|
|
1525 |
root |
1.1 |
=cut |
1526 |
|
|
|
1527 |
|
|
1 |
1528 |
|
|
|