1HTTP::Tiny(3) User Contributed Perl Documentation HTTP::Tiny(3)
2
6 HTTP::Tiny - A small, simple, correct HTTP/1.1 client
7
9 version 0.080
10
12 use HTTP::Tiny;
13 my $response = HTTP::Tiny->new->get('http://example.com/');
15 die "Failed!\n" unless $response->{success};
17 print "$response->{status} $response->{reason}\n";
19 while (my ($k, $v) = each %{$response->{headers}}) {
21 for (ref $v eq 'ARRAY' ? @$v : $v) {
22 print "$k: $_\n";
23 }
24 }
25 print $response->{content} if length $response->{content};
27
29 This is a very simple HTTP/1.1 client, designed for doing simple
30 requests without the overhead of a large framework like LWP::UserAgent.
31 It is more correct and more complete than HTTP::Lite. It supports
33 proxies and redirection. It also correctly resumes after EINTR.
34 If IO::Socket::IP 0.25 or later is installed, HTTP::Tiny will use it
36 instead of IO::Socket::INET for transparent support for both IPv4 and
37 IPv6.
38 Cookie support requires HTTP::CookieJar or an equivalent class.
40
42 new
43 $http = HTTP::Tiny->new( %attributes );
44 This constructor returns a new HTTP::Tiny object. Valid attributes
46 include:
47 • "agent" — A user-agent string (defaults to 'HTTP-Tiny/$VERSION').
49 If "agent" — ends in a space character, the default user-agent
50 string is appended.
51 • "cookie_jar" — An instance of HTTP::CookieJar — or equivalent class
53 that supports the "add" and "cookie_header" methods
54 • "default_headers" — A hashref of default headers to apply to
56 requests
57 • "local_address" — The local IP address to bind to
59 • "keep_alive" — Whether to reuse the last connection (if for the
61 same scheme, host and port) (defaults to 1)
62 • "max_redirect" — Maximum number of redirects allowed (defaults to
64 5)
65 • "max_size" — Maximum response size in bytes (only when not using a
67 data callback). If defined, requests with responses larger than
68 this will return a 599 status code.
69 • "http_proxy" — URL of a proxy server to use for HTTP connections
71 (default is $ENV{http_proxy} — if set)
72 • "https_proxy" — URL of a proxy server to use for HTTPS connections
74 (default is $ENV{https_proxy} — if set)
75 • "proxy" — URL of a generic proxy server for both HTTP and HTTPS
77 connections (default is $ENV{all_proxy} — if set)
78 • "no_proxy" — List of domain suffixes that should not be proxied.
80 Must be a comma-separated string or an array reference. (default is
81 $ENV{no_proxy} —)
82 • "timeout" — Request timeout in seconds (default is 60) If a socket
84 open, read or write takes longer than the timeout, the request
85 response status code will be 599.
86 • "verify_SSL" — A boolean that indicates whether to validate the SSL
88 certificate of an "https" — connection (default is false)
89 • "SSL_options" — A hashref of "SSL_*" — options to pass through to
91 IO::Socket::SSL
92 An accessor/mutator method exists for each attribute.
94 Passing an explicit "undef" for "proxy", "http_proxy" or "https_proxy"
96 will prevent getting the corresponding proxies from the environment.
97 Errors during request execution will result in a pseudo-HTTP status
99 code of 599 and a reason of "Internal Exception". The content field in
100 the response will contain the text of the error.
101 The "keep_alive" parameter enables a persistent connection, but only to
103 a single destination scheme, host and port. If any connection-relevant
104 attributes are modified via accessor, or if the process ID or thread ID
105 change, the persistent connection will be dropped. If you want
106 persistent connections across multiple destinations, use multiple
107 HTTP::Tiny objects.
108 See "SSL SUPPORT" for more on the "verify_SSL" and "SSL_options"
110 attributes.
111 get|head|put|post|patch|delete
113 $response = $http->get($url);
114 $response = $http->get($url, \%options);
115 $response = $http->head($url);
116 These methods are shorthand for calling "request()" for the given
118 method. The URL must have unsafe characters escaped and international
119 domain names encoded. See "request()" for valid options and a
120 description of the response.
121 The "success" field of the response will be true if the status code is
123 2XX.
124 post_form
126 $response = $http->post_form($url, $form_data);
127 $response = $http->post_form($url, $form_data, \%options);
128 This method executes a "POST" request and sends the key/value pairs
130 from a form data hash or array reference to the given URL with a
131 "content-type" of "application/x-www-form-urlencoded". If data is
132 provided as an array reference, the order is preserved; if provided as
133 a hash reference, the terms are sorted on key and value for
134 consistency. See documentation for the "www_form_urlencode" method for
135 details on the encoding.
136 The URL must have unsafe characters escaped and international domain
138 names encoded. See "request()" for valid options and a description of
139 the response. Any "content-type" header or content in the options
140 hashref will be ignored.
141 The "success" field of the response will be true if the status code is
143 2XX.
144 mirror
146 $response = $http->mirror($url, $file, \%options)
147 if ( $response->{success} ) {
148 print "$file is up to date\n";
149 }
150 Executes a "GET" request for the URL and saves the response body to the
152 file name provided. The URL must have unsafe characters escaped and
153 international domain names encoded. If the file already exists, the
154 request will include an "If-Modified-Since" header with the
155 modification timestamp of the file. You may specify a different
156 "If-Modified-Since" header yourself in the "$options->{headers}" hash.
157 The "success" field of the response will be true if the status code is
159 2XX or if the status code is 304 (unmodified).
160 If the file was modified and the server response includes a properly
162 formatted "Last-Modified" header, the file modification time will be
163 updated accordingly.
164 request
166 $response = $http->request($method, $url);
167 $response = $http->request($method, $url, \%options);
168 Executes an HTTP request of the given method type ('GET', 'HEAD',
170 'POST', 'PUT', etc.) on the given URL. The URL must have unsafe
171 characters escaped and international domain names encoded.
172 NOTE: Method names are case-sensitive per the HTTP/1.1 specification.
174 Don't use "get" when you really want "GET". See LIMITATIONS for how
175 this applies to redirection.
176 If the URL includes a "user:password" stanza, they will be used for
178 Basic-style authorization headers. (Authorization headers will not be
179 included in a redirected request.) For example:
180 $http->request('GET', 'http://Aladdin:open sesame@example.com/');
182 If the "user:password" stanza contains reserved characters, they must
184 be percent-escaped:
185 $http->request('GET', 'http://john%40example.com:password@example.com/');
187 A hashref of options may be appended to modify the request.
189 Valid options are:
191 • "headers" — A hashref containing headers to include with the
193 request. If the value for a header is an array reference, the
194 header will be output multiple times with each value in the array.
195 These headers over-write any default headers.
196 • "content" — A scalar to include as the body of the request OR a
198 code reference that will be called iteratively to produce the body
199 of the request
200 • "trailer_callback" — A code reference that will be called if it
202 exists to provide a hashref of trailing headers (only used with
203 chunked transfer-encoding)
204 • "data_callback" — A code reference that will be called for each
206 chunks of the response body received.
207 • "peer" — Override host resolution and force all connections to go
209 only to a specific peer address, regardless of the URL of the
210 request. This will include any redirections! This options should
211 be used with extreme caution (e.g. debugging or very special
212 circumstances). It can be given as either a scalar or a code
213 reference that will receive the hostname and whose response will be
214 taken as the address.
215 The "Host" header is generated from the URL in accordance with RFC
217 2616. It is a fatal error to specify "Host" in the "headers" option.
218 Other headers may be ignored or overwritten if necessary for transport
219 compliance.
220 If the "content" option is a code reference, it will be called
222 iteratively to provide the content body of the request. It should
223 return the empty string or undef when the iterator is exhausted.
224 If the "content" option is the empty string, no "content-type" or
226 "content-length" headers will be generated.
227 If the "data_callback" option is provided, it will be called
229 iteratively until the entire response body is received. The first
230 argument will be a string containing a chunk of the response body, the
231 second argument will be the in-progress response hash reference, as
232 described below. (This allows customizing the action of the callback
233 based on the "status" or "headers" received prior to the content body.)
234 The "request" method returns a hashref containing the response. The
236 hashref will have the following keys:
237 • "success" — Boolean indicating whether the operation returned a 2XX
239 status code
240 • "url" — URL that provided the response. This is the URL of the
242 request unless there were redirections, in which case it is the
243 last URL queried in a redirection chain
244 • "status" — The HTTP status code of the response
246 • "reason" — The response phrase returned by the server
248 • "content" — The body of the response. If the response does not
250 have any content or if a data callback is provided to consume the
251 response body, this will be the empty string
252 • "headers" — A hashref of header fields. All header field names
254 will be normalized to be lower case. If a header is repeated, the
255 value will be an arrayref; it will otherwise be a scalar string
256 containing the value
257 • "protocol" - If this field exists, it is the protocol of the
259 response such as HTTP/1.0 or HTTP/1.1
260 • "redirects" If this field exists, it is an arrayref of response
262 hash references from redirects in the same order that redirections
263 occurred. If it does not exist, then no redirections occurred.
264 On an error during the execution of the request, the "status" field
266 will contain 599, and the "content" field will contain the text of the
267 error.
268 www_form_urlencode
270 $params = $http->www_form_urlencode( $data );
271 $response = $http->get("http://example.com/query?$params");
272 This method converts the key/value pairs from a data hash or array
274 reference into a "x-www-form-urlencoded" string. The keys and values
275 from the data reference will be UTF-8 encoded and escaped per RFC 3986.
276 If a value is an array reference, the key will be repeated with each of
277 the values of the array reference. If data is provided as a hash
278 reference, the key/value pairs in the resulting string will be sorted
279 by key and value for consistent ordering.
280 can_ssl
282 $ok = HTTP::Tiny->can_ssl;
283 ($ok, $why) = HTTP::Tiny->can_ssl;
284 ($ok, $why) = $http->can_ssl;
285 Indicates if SSL support is available. When called as a class object,
287 it checks for the correct version of Net::SSLeay and IO::Socket::SSL.
288 When called as an object methods, if "SSL_verify" is true or if
289 "SSL_verify_mode" is set in "SSL_options", it checks that a CA file is
290 available.
291 In scalar context, returns a boolean indicating if SSL is available.
293 In list context, returns the boolean and a (possibly multi-line) string
294 of errors indicating why SSL isn't available.
295 connected
297 $host = $http->connected;
298 ($host, $port) = $http->connected;
299 Indicates if a connection to a peer is being kept alive, per the
301 "keep_alive" option.
302 In scalar context, returns the peer host and port, joined with a colon,
304 or "undef" (if no peer is connected). In list context, returns the
305 peer host and port or an empty list (if no peer is connected).
306 Note: This method cannot reliably be used to discover whether the
308 remote host has closed its end of the socket.
309
311 Direct "https" connections are supported only if IO::Socket::SSL 1.56
312 or greater and Net::SSLeay 1.49 or greater are installed. An error will
313 occur if new enough versions of these modules are not installed or if
314 the SSL encryption fails. You can also use "HTTP::Tiny::can_ssl()"
315 utility function that returns boolean to see if the required modules
316 are installed.
317 An "https" connection may be made via an "http" proxy that supports the
319 CONNECT command (i.e. RFC 2817). You may not proxy "https" via a proxy
320 that itself requires "https" to communicate.
321 SSL provides two distinct capabilities:
323 • Encrypted communication channel
325 • Verification of server identity
327 By default, HTTP::Tiny does not verify server identity.
329 Server identity verification is controversial and potentially tricky
331 because it depends on a (usually paid) third-party Certificate
332 Authority (CA) trust model to validate a certificate as legitimate.
333 This discriminates against servers with self-signed certificates or
334 certificates signed by free, community-driven CA's such as CAcert.org
335 <http://cacert.org>.
336 By default, HTTP::Tiny does not make any assumptions about your trust
338 model, threat level or risk tolerance. It just aims to give you an
339 encrypted channel when you need one.
340 Setting the "verify_SSL" attribute to a true value will make HTTP::Tiny
342 verify that an SSL connection has a valid SSL certificate corresponding
343 to the host name of the connection and that the SSL certificate has
344 been verified by a CA. Assuming you trust the CA, this will protect
345 against a man-in-the-middle attack <http://en.wikipedia.org/wiki/Man-
346 in-the-middle_attack>. If you are concerned about security, you should
347 enable this option.
348 Certificate verification requires a file containing trusted CA
350 certificates.
351 If the environment variable "SSL_CERT_FILE" is present, HTTP::Tiny will
353 try to find a CA certificate file in that location.
354 If the Mozilla::CA module is installed, HTTP::Tiny will use the CA file
356 included with it as a source of trusted CA's. (This means you trust
357 Mozilla, the author of Mozilla::CA, the CPAN mirror where you got
358 Mozilla::CA, the toolchain used to install it, and your operating
359 system security, right?)
360 If that module is not available, then HTTP::Tiny will search several
362 system-specific default locations for a CA certificate file:
363 • /etc/ssl/certs/ca-certificates.crt
365 • /etc/pki/tls/certs/ca-bundle.crt
367 • /etc/ssl/ca-bundle.pem
369 An error will be occur if "verify_SSL" is true and no CA certificate
371 file is available.
372 If you desire complete control over SSL connections, the "SSL_options"
374 attribute lets you provide a hash reference that will be passed through
375 to "IO::Socket::SSL::start_SSL()", overriding any options set by
376 HTTP::Tiny. For example, to provide your own trusted CA file:
377 SSL_options => {
379 SSL_ca_file => $file_path,
380 }
381 The "SSL_options" attribute could also be used for such things as
383 providing a client certificate for authentication to a server or
384 controlling the choice of cipher used for the SSL connection. See
385 IO::Socket::SSL documentation for details.
386
388 HTTP::Tiny can proxy both "http" and "https" requests. Only Basic
389 proxy authorization is supported and it must be provided as part of the
390 proxy URL: "http://user:pass@proxy.example.com/".
391 HTTP::Tiny supports the following proxy environment variables:
393 • http_proxy or HTTP_PROXY
395 • https_proxy or HTTPS_PROXY
397 • all_proxy or ALL_PROXY
399 If the "REQUEST_METHOD" environment variable is set, then this might be
401 a CGI process and "HTTP_PROXY" would be set from the "Proxy:" header,
402 which is a security risk. If "REQUEST_METHOD" is set, "HTTP_PROXY"
403 (the upper case variant only) is ignored, but "CGI_HTTP_PROXY" is
404 considered instead.
405 Tunnelling "https" over an "http" proxy using the CONNECT method is
407 supported. If your proxy uses "https" itself, you can not tunnel
408 "https" over it.
409 Be warned that proxying an "https" connection opens you to the risk of
411 a man-in-the-middle attack by the proxy server.
412 The "no_proxy" environment variable is supported in the format of a
414 comma-separated list of domain extensions proxy should not be used for.
415 Proxy arguments passed to "new" will override their corresponding
417 environment variables.
418
420 HTTP::Tiny is conditionally compliant with the HTTP/1.1 specifications
421 <http://www.w3.org/Protocols/>:
422 • "Message Syntax and Routing" [RFC7230]
424 • "Semantics and Content" [RFC7231]
426 • "Conditional Requests" [RFC7232]
428 • "Range Requests" [RFC7233]
430 • "Caching" [RFC7234]
432 • "Authentication" [RFC7235]
434 It attempts to meet all "MUST" requirements of the specification, but
436 does not implement all "SHOULD" requirements. (Note: it was developed
437 against the earlier RFC 2616 specification and may not yet meet the
438 revised RFC 7230-7235 spec.) Additionally, HTTP::Tiny supports the
439 "PATCH" method of RFC 5789.
440 Some particular limitations of note include:
442 • HTTP::Tiny focuses on correct transport. Users are responsible for
444 ensuring that user-defined headers and content are compliant with
445 the HTTP/1.1 specification.
446 • Users must ensure that URLs are properly escaped for unsafe
448 characters and that international domain names are properly encoded
449 to ASCII. See URI::Escape, URI::_punycode and Net::IDN::Encode.
450 • Redirection is very strict against the specification. Redirection
452 is only automatic for response codes 301, 302, 307 and 308 if the
453 request method is 'GET' or 'HEAD'. Response code 303 is always
454 converted into a 'GET' redirection, as mandated by the
455 specification. There is no automatic support for status 305 ("Use
456 proxy") redirections.
457 • There is no provision for delaying a request body using an "Expect"
459 header. Unexpected "1XX" responses are silently ignored as per the
460 specification.
461 • Only 'chunked' "Transfer-Encoding" is supported.
463 • There is no support for a Request-URI of '*' for the 'OPTIONS'
465 request.
466 • Headers mentioned in the RFCs and some other, well-known headers
468 are generated with their canonical case. Other headers are sent in
469 the case provided by the user. Except for control headers (which
470 are sent first), headers are sent in arbitrary order.
471 Despite the limitations listed above, HTTP::Tiny is considered feature-
473 complete. New feature requests should be directed to HTTP::Tiny::UA.
474
476 • HTTP::Tiny::UA - Higher level UA features for HTTP::Tiny
477 • HTTP::Thin - HTTP::Tiny wrapper with HTTP::Request/HTTP::Response
479 compatibility
480 • HTTP::Tiny::Mech - Wrap WWW::Mechanize instance in HTTP::Tiny
482 compatible interface
483 • IO::Socket::IP - Required for IPv6 support
485 • IO::Socket::SSL - Required for SSL support
487 • LWP::UserAgent - If HTTP::Tiny isn't enough for you, this is the
489 "standard" way to do things
490 • Mozilla::CA - Required if you want to validate SSL certificates
492 • Net::SSLeay - Required for SSL support
494
496 Bugs / Feature Requests
497 Please report any bugs or feature requests through the issue tracker at
498 <https://github.com/chansen/p5-http-tiny/issues>. You will be notified
499 automatically of any progress on your issue.
500 Source Code
502 This is open source software. The code repository is available for
503 public review and contribution under the terms of the license.
504 <https://github.com/chansen/p5-http-tiny>
506 git clone https://github.com/chansen/p5-http-tiny.git
508
510 • Christian Hansen <chansen@cpan.org>
511 • David Golden <dagolden@cpan.org>
513
515 • Alan Gardner <gardner@pythian.com>
516 • Alessandro Ghedini <al3xbio@gmail.com>
518 • A. Sinan Unur <nanis@cpan.org>
520 • Brad Gilbert <bgills@cpan.org>
522 • brian m. carlson <sandals@crustytoothpaste.net>
524 • Chris Nehren <apeiron@cpan.org>
526 • Chris Weyl <cweyl@alumni.drew.edu>
528 • Claes Jakobsson <claes@surfar.nu>
530 • Clinton Gormley <clint@traveljury.com>
532 • Craig A. Berry <craigberry@mac.com>
534 • Craig Berry <cberry@cpan.org>
536 • David Golden <xdg@xdg.me>
538 • David Mitchell <davem@iabyn.com>
540 • Dean Pearce <pearce@pythian.com>
542 • Edward Zborowski <ed@rubensteintech.com>
544 • Felipe Gasper <felipe@felipegasper.com>
546 • Greg Kennedy <kennedy.greg@gmail.com>
548 • James E Keenan <jkeenan@cpan.org>
550 • James Raspass <jraspass@gmail.com>
552 • Jeremy Mates <jmates@cpan.org>
554 • Jess Robinson <castaway@desert-island.me.uk>
556 • Karen Etheridge <ether@cpan.org>
558 • Lukas Eklund <leklund@gmail.com>
560 • Martin J. Evans <mjegh@ntlworld.com>
562 • Martin-Louis Bright <mlbright@gmail.com>
564 • Matthew Horsfall <wolfsage@gmail.com>
566 • Michael R. Davis <mrdvt92@users.noreply.github.com>
568 • Mike Doherty <doherty@cpan.org>
570 • Nicolas Rochelemagne <rochelemagne@cpanel.net>
572 • Olaf Alders <olaf@wundersolutions.com>
574 • Olivier Mengué <dolmen@cpan.org>
576 • Petr Písař <ppisar@redhat.com>
578 • sanjay-cpu <snjkmr32@gmail.com>
580 • Serguei Trouchelle <stro@cpan.org>
582 • Shoichi Kaji <skaji@cpan.org>
584 • SkyMarshal <skymarshal1729@gmail.com>
586 • Sören Kornetzki <soeren.kornetzki@delti.com>
588 • Steve Grazzini <steve.grazzini@grantstreet.com>
590 • Syohei YOSHIDA <syohex@gmail.com>
592 • Tatsuhiko Miyagawa <miyagawa@bulknews.net>
594 • Tom Hukins <tom@eborcom.com>
596 • Tony Cook <tony@develop-help.com>
598 • Xavier Guimard <yadd@debian.org>
600
602 This software is copyright (c) 2021 by Christian Hansen.
603 This is free software; you can redistribute it and/or modify it under
605 the same terms as the Perl 5 programming language system itself.
606perl v5.34.0 2022-01-21 HTTP::Tiny(3)