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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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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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use strict; |
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no warnings; |
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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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1.57 |
our $VERSION = '1.46'; |
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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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1.2 |
our $MAX_PERSISTENT = 8; |
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our $PERSISTENT_TIMEOUT = 2; |
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our $TIMEOUT = 300; |
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1.1 |
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# changing these is evil |
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1.43 |
our $MAX_PERSISTENT_PER_HOST = 0; |
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1.11 |
our $MAX_PER_HOST = 4; |
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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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1.1 |
my %KA_COUNT; # number of open keep-alive connections per host |
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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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destroyed before the callback is called, the request will be cancelled. |
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1.29 |
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The callback will be called with the response body data as first argument |
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(or C<undef> if an error occured), and a hash-ref with response headers as |
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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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three parts of the HTTP Status-Line of the same name. |
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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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1.32 |
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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1.41 |
then C<$data> will be C<undef>, C<< $headers->{Status} >> will be C<59x> |
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(usually C<599>) and the C<Reason> pseudo-header will contain an error |
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message. |
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1.2 |
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1.6 |
A typical callback might look like this: |
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sub { |
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my ($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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1.62 |
The request headers to use, with the header name (I<MUST be in lowercase>) |
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as key and header value as hash value. |
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Currently, http_request> may provide its own C<host>, C<content-length>, |
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C<connection> and C<cookie> headers and will provide defaults for |
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C<user-agent> and C<referer> (this can be suppressed by using a value of |
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C<undef> for these headers in which case they won't be sent at all). |
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1.1 |
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=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[, $scheme]] or undef |
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Use the given http proxy for all requests. If not specified, then the |
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default proxy (as specified by C<$ENV{http_proxy}>) is used. |
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1.47 |
C<$scheme> must be either missing, C<http> for HTTP or C<https> for |
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1.2 |
HTTPS. |
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1.1 |
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1.3 |
=item body => $string |
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The request body, usually empty. Will be-sent as-is (future versions of |
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this module might offer more options). |
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1.10 |
=item cookie_jar => $hash_ref |
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Passing this parameter enables (simplified) cookie-processing, loosely |
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based on the original netscape specification. |
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The C<$hash_ref> must be an (initially empty) hash reference which will |
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get updated automatically. It is possible to save the cookie_jar to |
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persistent storage with something like JSON or Storable, but this is not |
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1.40 |
recommended, as expiry times are currently being ignored. |
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1.10 |
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Note that this cookie implementation is not of very high quality, nor |
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meant to be complete. If you want complete cookie management you have to |
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do that on your own. C<cookie_jar> is meant as a quick fix to get some |
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cookie-using sites working. Cookies are a privacy disaster, do not use |
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them unless required to. |
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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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1.51 |
=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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1.42 |
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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This callback is useful when the data is too large to be held in memory |
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(so the callback writes it to a file) or when only some information should |
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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 |
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only used to create a connection, C<want_body_handle> is the better |
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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 => $enable |
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When enabled (default is disabled), the behaviour of AnyEvent::HTTP |
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changes considerably: after parsing the headers, and instead of |
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downloading the body (if any), the completion callback will be |
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called. Instead of the C<$body> argument containing the body data, the |
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callback will receive the L<AnyEvent::Handle> object associated with the |
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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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The handle object might or might not be in TLS mode, might be connected to |
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a proxy, be a persistent connection etc., and configured in unspecified |
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ways. The user is responsible for this handle (it will not be used by this |
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module anymore). |
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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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1.1 |
=back |
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1.9 |
Example: make a simple HTTP GET request for http://www.nethype.de/ |
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http_request GET => "http://www.nethype.de/", sub { |
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my ($body, $hdr) = @_; |
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print "$body\n"; |
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}; |
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Example: make a HTTP HEAD request on https://www.google.com/, use a |
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timeout of 30 seconds. |
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http_request |
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GET => "https://www.google.com", |
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timeout => 30, |
307 |
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sub { |
308 |
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my ($body, $hdr) = @_; |
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use Data::Dumper; |
310 |
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print Dumper $hdr; |
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} |
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; |
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1.1 |
|
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1.29 |
Example: make another simple HTTP GET request, but immediately try to |
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cancel it. |
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317 |
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my $request = http_request GET => "http://www.nethype.de/", sub { |
318 |
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my ($body, $hdr) = @_; |
319 |
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print "$body\n"; |
320 |
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}; |
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undef $request; |
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1.1 |
=cut |
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326 |
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1.12 |
sub _slot_schedule; |
327 |
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1.11 |
sub _slot_schedule($) { |
328 |
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my $host = shift; |
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330 |
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while ($CO_SLOT{$host}[0] < $MAX_PER_HOST) { |
331 |
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if (my $cb = shift @{ $CO_SLOT{$host}[1] }) { |
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1.12 |
# somebody wants that slot |
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1.11 |
++$CO_SLOT{$host}[0]; |
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1.14 |
++$ACTIVE; |
335 |
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1.11 |
|
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$cb->(AnyEvent::Util::guard { |
337 |
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1.14 |
--$ACTIVE; |
338 |
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1.11 |
--$CO_SLOT{$host}[0]; |
339 |
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_slot_schedule $host; |
340 |
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}); |
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} else { |
342 |
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# nobody wants the slot, maybe we can forget about it |
343 |
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delete $CO_SLOT{$host} unless $CO_SLOT{$host}[0]; |
344 |
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last; |
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} |
346 |
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} |
347 |
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} |
348 |
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349 |
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# wait for a free slot on host, call callback |
350 |
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sub _get_slot($$) { |
351 |
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push @{ $CO_SLOT{$_[0]}[1] }, $_[1]; |
352 |
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353 |
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_slot_schedule $_[0]; |
354 |
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} |
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356 |
root |
1.46 |
our $qr_nlnl = qr{(?<![^\012])\015?\012}; |
357 |
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1.34 |
|
358 |
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1.41 |
our $TLS_CTX_LOW = { cache => 1, sslv2 => 1 }; |
359 |
|
|
our $TLS_CTX_HIGH = { cache => 1, verify => 1, verify_peername => "https" }; |
360 |
root |
1.40 |
|
361 |
elmex |
1.15 |
sub http_request($$@) { |
362 |
root |
1.1 |
my $cb = pop; |
363 |
|
|
my ($method, $url, %arg) = @_; |
364 |
|
|
|
365 |
|
|
my %hdr; |
366 |
|
|
|
367 |
root |
1.40 |
$arg{tls_ctx} = $TLS_CTX_LOW if $arg{tls_ctx} eq "low" || !exists $arg{tls_ctx}; |
368 |
|
|
$arg{tls_ctx} = $TLS_CTX_HIGH if $arg{tls_ctx} eq "high"; |
369 |
|
|
|
370 |
root |
1.3 |
$method = uc $method; |
371 |
|
|
|
372 |
root |
1.8 |
if (my $hdr = $arg{headers}) { |
373 |
root |
1.1 |
while (my ($k, $v) = each %$hdr) { |
374 |
|
|
$hdr{lc $k} = $v; |
375 |
|
|
} |
376 |
|
|
} |
377 |
|
|
|
378 |
root |
1.55 |
# pseudo headers for all subsequent responses |
379 |
|
|
my @pseudo = (URL => $url); |
380 |
|
|
push @pseudo, Redirect => delete $arg{Redirect} if exists $arg{Redirect}; |
381 |
|
|
|
382 |
root |
1.23 |
my $recurse = exists $arg{recurse} ? delete $arg{recurse} : $MAX_RECURSE; |
383 |
root |
1.8 |
|
384 |
root |
1.55 |
return $cb->(undef, { Status => 599, Reason => "Too many redirections", @pseudo }) |
385 |
root |
1.8 |
if $recurse < 0; |
386 |
|
|
|
387 |
root |
1.2 |
my $proxy = $arg{proxy} || $PROXY; |
388 |
root |
1.1 |
my $timeout = $arg{timeout} || $TIMEOUT; |
389 |
|
|
|
390 |
root |
1.31 |
my ($uscheme, $uauthority, $upath, $query, $fragment) = |
391 |
root |
1.56 |
$url =~ m|(?:([^:/?#]+):)?(?://([^/?#]*))?([^?#]*)(?:(\?[^#]*))?(?:#(.*))?|; |
392 |
root |
1.2 |
|
393 |
root |
1.31 |
$uscheme = lc $uscheme; |
394 |
root |
1.1 |
|
395 |
root |
1.31 |
my $uport = $uscheme eq "http" ? 80 |
396 |
|
|
: $uscheme eq "https" ? 443 |
397 |
root |
1.55 |
: return $cb->(undef, { Status => 599, Reason => "Only http and https URL schemes supported", @pseudo }); |
398 |
root |
1.13 |
|
399 |
root |
1.31 |
$uauthority =~ /^(?: .*\@ )? ([^\@:]+) (?: : (\d+) )?$/x |
400 |
root |
1.55 |
or return $cb->(undef, { Status => 599, Reason => "Unparsable URL", @pseudo }); |
401 |
root |
1.10 |
|
402 |
|
|
my $uhost = $1; |
403 |
|
|
$uport = $2 if defined $2; |
404 |
|
|
|
405 |
root |
1.53 |
$hdr{host} = defined $2 ? "$uhost:$2" : "$uhost" |
406 |
|
|
unless exists $hdr{host}; |
407 |
root |
1.43 |
|
408 |
root |
1.10 |
$uhost =~ s/^\[(.*)\]$/$1/; |
409 |
root |
1.56 |
$upath .= $query if length $query; |
410 |
root |
1.10 |
|
411 |
|
|
$upath =~ s%^/?%/%; |
412 |
|
|
|
413 |
|
|
# cookie processing |
414 |
|
|
if (my $jar = $arg{cookie_jar}) { |
415 |
root |
1.31 |
%$jar = () if $jar->{version} != 1; |
416 |
root |
1.10 |
|
417 |
|
|
my @cookie; |
418 |
|
|
|
419 |
|
|
while (my ($chost, $v) = each %$jar) { |
420 |
root |
1.30 |
if ($chost =~ /^\./) { |
421 |
|
|
next unless $chost eq substr $uhost, -length $chost; |
422 |
|
|
} elsif ($chost =~ /\./) { |
423 |
|
|
next unless $chost eq $uhost; |
424 |
|
|
} else { |
425 |
|
|
next; |
426 |
|
|
} |
427 |
root |
1.10 |
|
428 |
|
|
while (my ($cpath, $v) = each %$v) { |
429 |
|
|
next unless $cpath eq substr $upath, 0, length $cpath; |
430 |
|
|
|
431 |
|
|
while (my ($k, $v) = each %$v) { |
432 |
root |
1.31 |
next if $uscheme ne "https" && exists $v->{secure}; |
433 |
|
|
my $value = $v->{value}; |
434 |
|
|
$value =~ s/([\\"])/\\$1/g; |
435 |
|
|
push @cookie, "$k=\"$value\""; |
436 |
root |
1.10 |
} |
437 |
|
|
} |
438 |
|
|
} |
439 |
|
|
|
440 |
|
|
$hdr{cookie} = join "; ", @cookie |
441 |
|
|
if @cookie; |
442 |
|
|
} |
443 |
root |
1.1 |
|
444 |
root |
1.31 |
my ($rhost, $rport, $rscheme, $rpath); # request host, port, path |
445 |
root |
1.2 |
|
446 |
root |
1.10 |
if ($proxy) { |
447 |
root |
1.38 |
($rpath, $rhost, $rport, $rscheme) = ($url, @$proxy); |
448 |
root |
1.31 |
|
449 |
root |
1.47 |
$rscheme = "http" unless defined $rscheme; |
450 |
|
|
|
451 |
root |
1.31 |
# don't support https requests over https-proxy transport, |
452 |
root |
1.38 |
# can't be done with tls as spec'ed, unless you double-encrypt. |
453 |
root |
1.31 |
$rscheme = "http" if $uscheme eq "https" && $rscheme eq "https"; |
454 |
root |
1.10 |
} else { |
455 |
root |
1.31 |
($rhost, $rport, $rscheme, $rpath) = ($uhost, $uport, $uscheme, $upath); |
456 |
root |
1.2 |
} |
457 |
|
|
|
458 |
root |
1.47 |
# leave out fragment and query string, just a heuristic |
459 |
|
|
$hdr{referer} ||= "$uscheme://$uauthority$upath" unless exists $hdr{referer}; |
460 |
|
|
$hdr{"user-agent"} ||= $USERAGENT unless exists $hdr{"user-agent"}; |
461 |
root |
1.41 |
|
462 |
root |
1.53 |
$hdr{"content-length"} = length $arg{body} |
463 |
|
|
if length $arg{body} || $method ne "GET"; |
464 |
root |
1.1 |
|
465 |
root |
1.11 |
my %state = (connect_guard => 1); |
466 |
|
|
|
467 |
|
|
_get_slot $uhost, sub { |
468 |
|
|
$state{slot_guard} = shift; |
469 |
root |
1.1 |
|
470 |
root |
1.11 |
return unless $state{connect_guard}; |
471 |
root |
1.1 |
|
472 |
root |
1.59 |
my $tcp_connect = $arg{tcp_connect} |
473 |
|
|
|| do { require AnyEvent::Socket; \&AnyEvent::Socket::tcp_connect }; |
474 |
|
|
|
475 |
|
|
$state{connect_guard} = $tcp_connect->( |
476 |
|
|
$rhost, |
477 |
|
|
$rport, |
478 |
|
|
sub { |
479 |
|
|
$state{fh} = shift |
480 |
|
|
or do { |
481 |
|
|
my $err = "$!"; |
482 |
|
|
%state = (); |
483 |
|
|
return $cb->(undef, { Status => 599, Reason => $err, @pseudo }); |
484 |
|
|
}; |
485 |
root |
1.44 |
|
486 |
root |
1.59 |
pop; # free memory, save a tree |
487 |
root |
1.11 |
|
488 |
root |
1.59 |
return unless delete $state{connect_guard}; |
489 |
root |
1.11 |
|
490 |
root |
1.59 |
# get handle |
491 |
|
|
$state{handle} = new AnyEvent::Handle |
492 |
|
|
fh => $state{fh}, |
493 |
|
|
peername => $rhost, |
494 |
|
|
tls_ctx => $arg{tls_ctx}, |
495 |
|
|
# these need to be reconfigured on keepalive handles |
496 |
|
|
timeout => $timeout, |
497 |
|
|
on_error => sub { |
498 |
|
|
%state = (); |
499 |
|
|
$cb->(undef, { Status => 599, Reason => $_[2], @pseudo }); |
500 |
|
|
}, |
501 |
|
|
on_eof => sub { |
502 |
|
|
%state = (); |
503 |
|
|
$cb->(undef, { Status => 599, Reason => "Unexpected end-of-file", @pseudo }); |
504 |
|
|
}, |
505 |
|
|
; |
506 |
root |
1.11 |
|
507 |
root |
1.59 |
# limit the number of persistent connections |
508 |
|
|
# keepalive not yet supported |
509 |
root |
1.56 |
# if ($KA_COUNT{$_[1]} < $MAX_PERSISTENT_PER_HOST) { |
510 |
|
|
# ++$KA_COUNT{$_[1]}; |
511 |
|
|
# $state{handle}{ka_count_guard} = AnyEvent::Util::guard { |
512 |
|
|
# --$KA_COUNT{$_[1]} |
513 |
|
|
# }; |
514 |
|
|
# $hdr{connection} = "keep-alive"; |
515 |
|
|
# } else { |
516 |
root |
1.59 |
delete $hdr{connection}; |
517 |
root |
1.56 |
# } |
518 |
root |
1.1 |
|
519 |
root |
1.59 |
$state{handle}->starttls ("connect") if $rscheme eq "https"; |
520 |
|
|
|
521 |
|
|
# handle actual, non-tunneled, request |
522 |
|
|
my $handle_actual_request = sub { |
523 |
|
|
$state{handle}->starttls ("connect") if $uscheme eq "https" && !exists $state{handle}{tls}; |
524 |
|
|
|
525 |
|
|
# send request |
526 |
|
|
$state{handle}->push_write ( |
527 |
|
|
"$method $rpath HTTP/1.0\015\012" |
528 |
|
|
. (join "", map "\u$_: $hdr{$_}\015\012", grep defined $hdr{$_}, keys %hdr) |
529 |
|
|
. "\015\012" |
530 |
|
|
. (delete $arg{body}) |
531 |
|
|
); |
532 |
|
|
|
533 |
|
|
# return if error occured during push_write() |
534 |
|
|
return unless %state; |
535 |
|
|
|
536 |
|
|
%hdr = (); # reduce memory usage, save a kitten, also make it possible to re-use |
537 |
|
|
|
538 |
|
|
# status line and headers |
539 |
|
|
$state{handle}->push_read (line => $qr_nlnl, sub { |
540 |
|
|
for ("$_[1]") { |
541 |
|
|
y/\015//d; # weed out any \015, as they show up in the weirdest of places. |
542 |
|
|
|
543 |
|
|
/^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )? \015?\012/igxc |
544 |
|
|
or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid server response", @pseudo })); |
545 |
|
|
|
546 |
|
|
push @pseudo, |
547 |
|
|
HTTPVersion => $1, |
548 |
|
|
Status => $2, |
549 |
|
|
Reason => $3, |
550 |
|
|
; |
551 |
|
|
|
552 |
|
|
# things seen, not parsed: |
553 |
|
|
# p3pP="NON CUR OTPi OUR NOR UNI" |
554 |
|
|
|
555 |
|
|
$hdr{lc $1} .= ",$2" |
556 |
|
|
while /\G |
557 |
|
|
([^:\000-\037]*): |
558 |
|
|
[\011\040]* |
559 |
|
|
((?: [^\012]+ | \012[\011\040] )*) |
560 |
|
|
\012 |
561 |
|
|
/gxc; |
562 |
root |
1.31 |
|
563 |
root |
1.59 |
/\G$/ |
564 |
|
|
or return (%state = (), $cb->(undef, { Status => 599, Reason => "Garbled response headers", @pseudo })); |
565 |
root |
1.41 |
} |
566 |
|
|
|
567 |
root |
1.59 |
# remove the "," prefix we added to all headers above |
568 |
|
|
substr $_, 0, 1, "" |
569 |
|
|
for values %hdr; |
570 |
|
|
|
571 |
|
|
# patch in all pseudo headers |
572 |
|
|
%hdr = (%hdr, @pseudo); |
573 |
|
|
|
574 |
|
|
# redirect handling |
575 |
|
|
# microsoft and other shitheads don't give a shit for following standards, |
576 |
|
|
# try to support some common forms of broken Location headers. |
577 |
|
|
if ($hdr{location} !~ /^(?: $ | [^:\/?\#]+ : )/x) { |
578 |
|
|
$hdr{location} =~ s/^\.\/+//; |
579 |
|
|
|
580 |
|
|
my $url = "$rscheme://$uhost:$uport"; |
581 |
|
|
|
582 |
|
|
unless ($hdr{location} =~ s/^\///) { |
583 |
|
|
$url .= $upath; |
584 |
|
|
$url =~ s/\/[^\/]*$//; |
585 |
|
|
} |
586 |
|
|
|
587 |
|
|
$hdr{location} = "$url/$hdr{location}"; |
588 |
|
|
} |
589 |
root |
1.57 |
|
590 |
root |
1.59 |
my $redirect; |
591 |
root |
1.41 |
|
592 |
root |
1.59 |
if ($recurse) { |
593 |
|
|
my $status = $hdr{Status}; |
594 |
root |
1.55 |
|
595 |
root |
1.59 |
# industry standard is to redirect POST as GET for |
596 |
|
|
# 301, 302 and 303, in contrast to http/1.0 and 1.1. |
597 |
|
|
# also, the UA should ask the user for 301 and 307 and POST, |
598 |
|
|
# industry standard seems to be to simply follow. |
599 |
|
|
# we go with the industry standard. |
600 |
|
|
if ($status == 301 or $status == 302 or $status == 303) { |
601 |
|
|
# HTTP/1.1 is unclear on how to mutate the method |
602 |
|
|
$method = "GET" unless $method eq "HEAD"; |
603 |
|
|
$redirect = 1; |
604 |
|
|
} elsif ($status == 307) { |
605 |
|
|
$redirect = 1; |
606 |
|
|
} |
607 |
root |
1.41 |
} |
608 |
|
|
|
609 |
root |
1.59 |
my $finish = sub { |
610 |
|
|
$state{handle}->destroy if $state{handle}; |
611 |
|
|
%state = (); |
612 |
|
|
|
613 |
|
|
# set-cookie processing |
614 |
|
|
if ($arg{cookie_jar}) { |
615 |
|
|
for ($_[1]{"set-cookie"}) { |
616 |
|
|
# parse NAME=VALUE |
617 |
|
|
my @kv; |
618 |
|
|
|
619 |
|
|
while (/\G\s* ([^=;,[:space:]]+) \s*=\s* (?: "((?:[^\\"]+|\\.)*)" | ([^=;,[:space:]]*) )/gcxs) { |
620 |
|
|
my $name = $1; |
621 |
|
|
my $value = $3; |
622 |
|
|
|
623 |
|
|
unless ($value) { |
624 |
|
|
$value = $2; |
625 |
|
|
$value =~ s/\\(.)/$1/gs; |
626 |
|
|
} |
627 |
|
|
|
628 |
|
|
push @kv, $name => $value; |
629 |
root |
1.31 |
|
630 |
root |
1.59 |
last unless /\G\s*;/gc; |
631 |
root |
1.57 |
} |
632 |
|
|
|
633 |
root |
1.59 |
last unless @kv; |
634 |
root |
1.31 |
|
635 |
root |
1.59 |
my $name = shift @kv; |
636 |
|
|
my %kv = (value => shift @kv, @kv); |
637 |
root |
1.31 |
|
638 |
root |
1.59 |
my $cdom; |
639 |
|
|
my $cpath = (delete $kv{path}) || "/"; |
640 |
root |
1.10 |
|
641 |
root |
1.59 |
if (exists $kv{domain}) { |
642 |
|
|
$cdom = delete $kv{domain}; |
643 |
|
|
|
644 |
|
|
$cdom =~ s/^\.?/./; # make sure it starts with a "." |
645 |
root |
1.11 |
|
646 |
root |
1.59 |
next if $cdom =~ /\.$/; |
647 |
|
|
|
648 |
|
|
# this is not rfc-like and not netscape-like. go figure. |
649 |
|
|
my $ndots = $cdom =~ y/.//; |
650 |
|
|
next if $ndots < ($cdom =~ /\.[^.][^.]\.[^.][^.]$/ ? 3 : 2); |
651 |
|
|
} else { |
652 |
|
|
$cdom = $uhost; |
653 |
|
|
} |
654 |
|
|
|
655 |
|
|
# store it |
656 |
|
|
$arg{cookie_jar}{version} = 1; |
657 |
|
|
$arg{cookie_jar}{$cdom}{$cpath}{$name} = \%kv; |
658 |
root |
1.11 |
|
659 |
root |
1.59 |
redo if /\G\s*,/gc; |
660 |
root |
1.57 |
} |
661 |
root |
1.59 |
} |
662 |
root |
1.31 |
|
663 |
root |
1.59 |
if ($redirect && exists $hdr{location}) { |
664 |
|
|
# we ignore any errors, as it is very common to receive |
665 |
|
|
# Content-Length != 0 but no actual body |
666 |
|
|
# we also access %hdr, as $_[1] might be an erro |
667 |
|
|
http_request ( |
668 |
|
|
$method => $hdr{location}, |
669 |
|
|
%arg, |
670 |
|
|
recurse => $recurse - 1, |
671 |
|
|
Redirect => \@_, |
672 |
|
|
$cb); |
673 |
|
|
} else { |
674 |
|
|
$cb->($_[0], $_[1]); |
675 |
root |
1.11 |
} |
676 |
root |
1.59 |
}; |
677 |
|
|
|
678 |
|
|
my $len = $hdr{"content-length"}; |
679 |
root |
1.8 |
|
680 |
root |
1.59 |
if (!$redirect && $arg{on_header} && !$arg{on_header}(\%hdr)) { |
681 |
|
|
$finish->(undef, { Status => 598, Reason => "Request cancelled by on_header", @pseudo }); |
682 |
|
|
} elsif ( |
683 |
|
|
$hdr{Status} =~ /^(?:1..|[23]04)$/ |
684 |
|
|
or $method eq "HEAD" |
685 |
|
|
or (defined $len && !$len) |
686 |
|
|
) { |
687 |
|
|
# no body |
688 |
|
|
$finish->("", \%hdr); |
689 |
root |
1.57 |
} else { |
690 |
root |
1.59 |
# body handling, four different code paths |
691 |
|
|
# for want_body_handle, on_body (2x), normal (2x) |
692 |
|
|
# we might read too much here, but it does not matter yet (no pers. connections) |
693 |
|
|
if (!$redirect && $arg{want_body_handle}) { |
694 |
|
|
$_[0]->on_eof (undef); |
695 |
|
|
$_[0]->on_error (undef); |
696 |
|
|
$_[0]->on_read (undef); |
697 |
root |
1.24 |
|
698 |
root |
1.59 |
$finish->(delete $state{handle}, \%hdr); |
699 |
root |
1.41 |
|
700 |
root |
1.59 |
} elsif ($arg{on_body}) { |
701 |
|
|
$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) }); |
702 |
|
|
if ($len) { |
703 |
|
|
$_[0]->on_eof (undef); |
704 |
|
|
$_[0]->on_read (sub { |
705 |
|
|
$len -= length $_[0]{rbuf}; |
706 |
|
|
|
707 |
|
|
$arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
708 |
|
|
or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo }); |
709 |
|
|
|
710 |
|
|
$len > 0 |
711 |
|
|
or $finish->("", \%hdr); |
712 |
|
|
}); |
713 |
|
|
} else { |
714 |
|
|
$_[0]->on_eof (sub { |
715 |
|
|
$finish->("", \%hdr); |
716 |
|
|
}); |
717 |
|
|
$_[0]->on_read (sub { |
718 |
|
|
$arg{on_body}(delete $_[0]{rbuf}, \%hdr) |
719 |
|
|
or $finish->(undef, { Status => 598, Reason => "Request cancelled by on_body", @pseudo }); |
720 |
|
|
}); |
721 |
|
|
} |
722 |
|
|
} else { |
723 |
root |
1.41 |
$_[0]->on_eof (undef); |
724 |
|
|
|
725 |
root |
1.59 |
if ($len) { |
726 |
|
|
$_[0]->on_error (sub { $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }) }); |
727 |
|
|
$_[0]->on_read (sub { |
728 |
|
|
$finish->((substr delete $_[0]{rbuf}, 0, $len, ""), \%hdr) |
729 |
|
|
if $len <= length $_[0]{rbuf}; |
730 |
|
|
}); |
731 |
|
|
} else { |
732 |
|
|
$_[0]->on_error (sub { |
733 |
|
|
($! == Errno::EPIPE || !$!) |
734 |
|
|
? $finish->(delete $_[0]{rbuf}, \%hdr) |
735 |
|
|
: $finish->(undef, { Status => 599, Reason => $_[2], @pseudo }); |
736 |
|
|
}); |
737 |
|
|
$_[0]->on_read (sub { }); |
738 |
|
|
} |
739 |
|
|
} |
740 |
|
|
} |
741 |
|
|
}); |
742 |
|
|
}; |
743 |
root |
1.57 |
|
744 |
root |
1.59 |
# now handle proxy-CONNECT method |
745 |
|
|
if ($proxy && $uscheme eq "https") { |
746 |
|
|
# oh dear, we have to wrap it into a connect request |
747 |
|
|
|
748 |
|
|
# maybe re-use $uauthority with patched port? |
749 |
|
|
$state{handle}->push_write ("CONNECT $uhost:$uport HTTP/1.0\015\012Host: $uhost\015\012\015\012"); |
750 |
|
|
$state{handle}->push_read (line => $qr_nlnl, sub { |
751 |
|
|
$_[1] =~ /^HTTP\/([0-9\.]+) \s+ ([0-9]{3}) (?: \s+ ([^\015\012]*) )?/ix |
752 |
|
|
or return (%state = (), $cb->(undef, { Status => 599, Reason => "Invalid proxy connect response ($_[1])", @pseudo })); |
753 |
|
|
|
754 |
|
|
if ($2 == 200) { |
755 |
|
|
$rpath = $upath; |
756 |
|
|
&$handle_actual_request; |
757 |
root |
1.57 |
} else { |
758 |
root |
1.59 |
%state = (); |
759 |
|
|
$cb->(undef, { Status => $2, Reason => $3, @pseudo }); |
760 |
root |
1.11 |
} |
761 |
root |
1.59 |
}); |
762 |
|
|
} else { |
763 |
|
|
&$handle_actual_request; |
764 |
|
|
} |
765 |
root |
1.31 |
|
766 |
root |
1.59 |
}, |
767 |
|
|
$arg{on_prepare} || sub { $timeout } |
768 |
|
|
); |
769 |
root |
1.1 |
}; |
770 |
|
|
|
771 |
|
|
defined wantarray && AnyEvent::Util::guard { %state = () } |
772 |
|
|
} |
773 |
|
|
|
774 |
elmex |
1.15 |
sub http_get($@) { |
775 |
root |
1.1 |
unshift @_, "GET"; |
776 |
|
|
&http_request |
777 |
|
|
} |
778 |
|
|
|
779 |
elmex |
1.15 |
sub http_head($@) { |
780 |
root |
1.4 |
unshift @_, "HEAD"; |
781 |
|
|
&http_request |
782 |
|
|
} |
783 |
|
|
|
784 |
elmex |
1.15 |
sub http_post($$@) { |
785 |
root |
1.22 |
my $url = shift; |
786 |
|
|
unshift @_, "POST", $url, "body"; |
787 |
root |
1.3 |
&http_request |
788 |
|
|
} |
789 |
|
|
|
790 |
root |
1.9 |
=back |
791 |
|
|
|
792 |
root |
1.55 |
=head2 DNS CACHING |
793 |
|
|
|
794 |
|
|
AnyEvent::HTTP uses the AnyEvent::Socket::tcp_connect function for |
795 |
|
|
the actual connection, which in turn uses AnyEvent::DNS to resolve |
796 |
|
|
hostnames. The latter is a simple stub resolver and does no caching |
797 |
|
|
on its own. If you want DNS caching, you currently have to provide |
798 |
|
|
your own default resolver (by storing a suitable resolver object in |
799 |
|
|
C<$AnyEvent::DNS::RESOLVER>). |
800 |
|
|
|
801 |
root |
1.2 |
=head2 GLOBAL FUNCTIONS AND VARIABLES |
802 |
root |
1.1 |
|
803 |
|
|
=over 4 |
804 |
|
|
|
805 |
root |
1.2 |
=item AnyEvent::HTTP::set_proxy "proxy-url" |
806 |
|
|
|
807 |
|
|
Sets the default proxy server to use. The proxy-url must begin with a |
808 |
root |
1.52 |
string of the form C<http://host:port> (optionally C<https:...>), croaks |
809 |
|
|
otherwise. |
810 |
|
|
|
811 |
|
|
To clear an already-set proxy, use C<undef>. |
812 |
root |
1.2 |
|
813 |
root |
1.61 |
=item $date = AnyEvent::HTTP::format_date $timestamp |
814 |
|
|
|
815 |
|
|
Takes a POSIX timestamp (seconds since the epoch) and formats it as a HTTP |
816 |
|
|
Date (RFC 2616). |
817 |
|
|
|
818 |
|
|
=item $timestamp = AnyEvent::HTTP::parse_date $date |
819 |
|
|
|
820 |
|
|
Takes a HTTP Date (RFC 2616) and returns the corresponding POSIX |
821 |
|
|
timestamp, or C<undef> if the date cannot be parsed. |
822 |
|
|
|
823 |
root |
1.3 |
=item $AnyEvent::HTTP::MAX_RECURSE |
824 |
root |
1.1 |
|
825 |
root |
1.3 |
The default value for the C<recurse> request parameter (default: C<10>). |
826 |
root |
1.1 |
|
827 |
|
|
=item $AnyEvent::HTTP::USERAGENT |
828 |
|
|
|
829 |
|
|
The default value for the C<User-Agent> header (the default is |
830 |
root |
1.40 |
C<Mozilla/5.0 (compatible; U; AnyEvent-HTTP/$VERSION; +http://software.schmorp.de/pkg/AnyEvent)>). |
831 |
root |
1.1 |
|
832 |
root |
1.43 |
=item $AnyEvent::HTTP::MAX_PER_HOST |
833 |
root |
1.1 |
|
834 |
root |
1.47 |
The maximum number of concurrent connections to the same host (identified |
835 |
root |
1.43 |
by the hostname). If the limit is exceeded, then the additional requests |
836 |
|
|
are queued until previous connections are closed. |
837 |
root |
1.1 |
|
838 |
root |
1.43 |
The default value for this is C<4>, and it is highly advisable to not |
839 |
|
|
increase it. |
840 |
root |
1.3 |
|
841 |
root |
1.14 |
=item $AnyEvent::HTTP::ACTIVE |
842 |
|
|
|
843 |
|
|
The number of active connections. This is not the number of currently |
844 |
|
|
running requests, but the number of currently open and non-idle TCP |
845 |
|
|
connections. This number of can be useful for load-leveling. |
846 |
|
|
|
847 |
root |
1.1 |
=back |
848 |
|
|
|
849 |
|
|
=cut |
850 |
|
|
|
851 |
root |
1.61 |
our @month = qw(Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec); |
852 |
|
|
our @weekday = qw(Sun Mon Tue Wed Thu Fri Sat); |
853 |
|
|
|
854 |
|
|
sub format_date($) { |
855 |
|
|
my ($time) = @_; |
856 |
|
|
|
857 |
|
|
# RFC 822/1123 format |
858 |
|
|
my ($S, $M, $H, $mday, $mon, $year, $wday, $yday, undef) = gmtime $time; |
859 |
|
|
|
860 |
|
|
sprintf "%s, %02d %s %04d %02d:%02d:%02d GMT", |
861 |
|
|
$weekday[$wday], $mday, $month[$mon], $year + 1900, |
862 |
|
|
$H, $M, $S; |
863 |
|
|
} |
864 |
|
|
|
865 |
|
|
sub parse_date($) { |
866 |
|
|
my ($date) = @_; |
867 |
|
|
|
868 |
|
|
my ($d, $m, $y, $H, $M, $S); |
869 |
|
|
|
870 |
|
|
if ($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$/) { |
871 |
|
|
# RFC 822/1123, required by RFC 2616 |
872 |
|
|
($d, $m, $y, $H, $M, $S) = ($1, $2, $3, $4, $5, $6); |
873 |
|
|
|
874 |
|
|
} elsif ($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$/) { |
875 |
|
|
# RFC 850 |
876 |
|
|
($d, $m, $y, $H, $M, $S) = ($1, $2, $3 < 69 ? $3 + 2000 : $3 + 1900, $4, $5, $6); |
877 |
|
|
|
878 |
|
|
} elsif ($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])$/) { |
879 |
|
|
# ISO C's asctime |
880 |
|
|
($d, $m, $y, $H, $M, $S) = ($2, $1, $6, $3, $4, $5); |
881 |
|
|
} |
882 |
|
|
# other formats fail in the loop below |
883 |
|
|
|
884 |
|
|
for (0..11) { |
885 |
|
|
if ($m eq $month[$_]) { |
886 |
|
|
require Time::Local; |
887 |
|
|
return Time::Local::timegm ($S, $M, $H, $d, $_, $y); |
888 |
|
|
} |
889 |
|
|
} |
890 |
|
|
|
891 |
|
|
undef |
892 |
|
|
} |
893 |
|
|
|
894 |
root |
1.2 |
sub set_proxy($) { |
895 |
root |
1.52 |
if (length $_[0]) { |
896 |
|
|
$_[0] =~ m%^(https?):// ([^:/]+) (?: : (\d*) )?%ix |
897 |
|
|
or Carp::croak "$_[0]: invalid proxy URL"; |
898 |
|
|
$PROXY = [$2, $3 || 3128, $1] |
899 |
|
|
} else { |
900 |
|
|
undef $PROXY; |
901 |
|
|
} |
902 |
root |
1.2 |
} |
903 |
|
|
|
904 |
|
|
# initialise proxy from environment |
905 |
root |
1.52 |
eval { |
906 |
|
|
set_proxy $ENV{http_proxy}; |
907 |
|
|
}; |
908 |
root |
1.2 |
|
909 |
root |
1.60 |
=head2 SOCKS PROXIES |
910 |
|
|
|
911 |
|
|
Socks proxies are not directly supported by AnyEvent::HTTP. You can |
912 |
|
|
compile your perl to support socks, or use an external program such as |
913 |
|
|
F<socksify> (dante) or F<tsocks> to make your program use a socks proxy |
914 |
|
|
transparently. |
915 |
|
|
|
916 |
|
|
Alternatively, for AnyEvent::HTTP only, you can use your own |
917 |
|
|
C<tcp_connect> function that does the proxy handshake - here is an example |
918 |
|
|
that works with socks4a proxies: |
919 |
|
|
|
920 |
|
|
use Errno; |
921 |
|
|
use AnyEvent::Util; |
922 |
|
|
use AnyEvent::Socket; |
923 |
|
|
use AnyEvent::Handle; |
924 |
|
|
|
925 |
|
|
# host, port and username of/for your socks4a proxy |
926 |
|
|
my $socks_host = "10.0.0.23"; |
927 |
|
|
my $socks_port = 9050; |
928 |
|
|
my $socks_user = ""; |
929 |
|
|
|
930 |
|
|
sub socks4a_connect { |
931 |
|
|
my ($host, $port, $connect_cb, $prepare_cb) = @_; |
932 |
|
|
|
933 |
|
|
my $hdl = new AnyEvent::Handle |
934 |
|
|
connect => [$socks_host, $socks_port], |
935 |
|
|
on_prepare => sub { $prepare_cb->($_[0]{fh}) }, |
936 |
|
|
on_error => sub { $connect_cb->() }, |
937 |
|
|
; |
938 |
|
|
|
939 |
|
|
$hdl->push_write (pack "CCnNZ*Z*", 4, 1, $port, 1, $socks_user, $host); |
940 |
|
|
|
941 |
|
|
$hdl->push_read (chunk => 8, sub { |
942 |
|
|
my ($hdl, $chunk) = @_; |
943 |
|
|
my ($status, $port, $ipn) = unpack "xCna4", $chunk; |
944 |
|
|
|
945 |
|
|
if ($status == 0x5a) { |
946 |
|
|
$connect_cb->($hdl->{fh}, (format_address $ipn) . ":$port"); |
947 |
|
|
} else { |
948 |
|
|
$! = Errno::ENXIO; $connect_cb->(); |
949 |
|
|
} |
950 |
|
|
}); |
951 |
|
|
|
952 |
|
|
$hdl |
953 |
|
|
} |
954 |
|
|
|
955 |
|
|
Use C<socks4a_connect> instead of C<tcp_connect> when doing C<http_request>s, |
956 |
|
|
possibly after switching off other proxy types: |
957 |
|
|
|
958 |
|
|
AnyEvent::HTTP::set_proxy undef; # usually you do not want other proxies |
959 |
|
|
|
960 |
|
|
http_get 'http://www.google.com', tcp_connect => \&socks4a_connect, sub { |
961 |
|
|
my ($data, $headers) = @_; |
962 |
|
|
... |
963 |
|
|
}; |
964 |
|
|
|
965 |
root |
1.1 |
=head1 SEE ALSO |
966 |
|
|
|
967 |
|
|
L<AnyEvent>. |
968 |
|
|
|
969 |
|
|
=head1 AUTHOR |
970 |
|
|
|
971 |
root |
1.18 |
Marc Lehmann <schmorp@schmorp.de> |
972 |
|
|
http://home.schmorp.de/ |
973 |
root |
1.1 |
|
974 |
root |
1.36 |
With many thanks to Дмитрий Шалашов, who provided countless |
975 |
|
|
testcases and bugreports. |
976 |
|
|
|
977 |
root |
1.1 |
=cut |
978 |
|
|
|
979 |
|
|
1 |
980 |
|
|
|