NAME

Mojo::UserAgent - Non-blocking I/O HTTP and WebSocket user agent

SYNOPSIS

use Mojo::UserAgent;

# Say hello to the Unicode snowman with "Do Not Track" header
my $ua = Mojo::UserAgent->new;
say $ua->get('www.☃.net?hello=there' => {DNT => 1})->res->body;

# Form POST with exception handling
my $tx = $ua->post('https://metacpan.org/search' => form => {q => 'mojo'});
if (my $res = $tx->success) { say $res->body }
else {
  my ($err, $code) = $tx->error;
  say $code ? "$code response: $err" : "Connection error: $err";
}

# Quick JSON API request with Basic authentication
say $ua->get('https://sri:s3cret@example.com/search.json?q=perl')
  ->res->json('/results/0/title');

# Extract data from HTML and XML resources
say $ua->get('www.perl.org')->res->dom->html->head->title->text;

# Scrape the latest headlines from a news site
say $ua->get('perlnews.org')->res->dom('h2 > a')->text->shuffle;

# IPv6 PUT request with content
my $tx
  = $ua->put('[::1]:3000' => {'Content-Type' => 'text/plain'} => 'Hello!');

# Grab the latest Mojolicious release :)
$ua->max_redirects(5)->get('latest.mojolicio.us')
  ->res->content->asset->move_to('/Users/sri/mojo.tar.gz');

# TLS certificate authentication and JSON POST
my $tx = $ua->cert('tls.crt')->key('tls.key')
  ->post('https://example.com' => json => {top => 'secret'});

# Blocking parallel requests (does not work inside a running event loop)
my $delay = Mojo::IOLoop->delay;
for my $url ('mojolicio.us', 'cpan.org') {
  my $end = $delay->begin(0);
  $ua->get($url => sub {
    my ($ua, $tx) = @_;
    $end->($tx->res->dom->at('title')->text);
  });
}
my @titles = $delay->wait;

# Non-blocking parallel requests (does work inside a running event loop)
my $delay = Mojo::IOLoop->delay(sub {
  my ($delay, @titles) = @_;
  ...
});
for my $url ('mojolicio.us', 'cpan.org') {
  my $end = $delay->begin(0);
  $ua->get($url => sub {
    my ($ua, $tx) = @_;
    $end->($tx->res->dom->at('title')->text);
  });
}
$delay->wait unless Mojo::IOLoop->is_running;

# Non-blocking WebSocket connection sending and receiving JSON messages
$ua->websocket('ws://example.com/echo.json' => sub {
  my ($ua, $tx) = @_;
  say 'WebSocket handshake failed!' and return unless $tx->is_websocket;
  $tx->on(json => sub {
    my ($tx, $hash) = @_;
    say "WebSocket message via JSON: $hash->{msg}";
    $tx->finish;
  });
  $tx->send({json => {msg => 'Hello World!'}});
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

DESCRIPTION

Mojo::UserAgent is a full featured non-blocking I/O HTTP and WebSocket user agent, with IPv6, TLS, SNI, IDNA, Comet (long polling), keep-alive, connection pooling, timeout, cookie, multipart, proxy, gzip compression and multiple event loop support.

All connections will be reset automatically if a new process has been forked, this allows multiple processes to share the same Mojo::UserAgent object safely.

For better scalability (epoll, kqueue) and to provide IPv6 as well as TLS support, the optional modules EV (4.0+), IO::Socket::IP (0.16+) and IO::Socket::SSL (1.75+) will be used automatically by Mojo::IOLoop if they are installed. Individual features can also be disabled with the MOJO_NO_IPV6 and MOJO_NO_TLS environment variables.

See Mojolicious::Guides::Cookbook for more.

EVENTS

Mojo::UserAgent inherits all events from Mojo::EventEmitter and can emit the following new ones.

error

$ua->on(error => sub {
  my ($ua, $err) = @_;
  ...
});

Emitted if an error occurs that can't be associated with a transaction, fatal if unhandled.

$ua->on(error => sub {
  my ($ua, $err) = @_;
  say "This looks bad: $err";
});

start

$ua->on(start => sub {
  my ($ua, $tx) = @_;
  ...
});

Emitted whenever a new transaction is about to start, this includes automatically prepared proxy CONNECT requests and followed redirects.

$ua->on(start => sub {
  my ($ua, $tx) = @_;
  $tx->req->headers->header('X-Bender' => 'Bite my shiny metal ass!');
});

ATTRIBUTES

Mojo::UserAgent implements the following attributes.

ca

my $ca = $ua->ca;
$ua    = $ua->ca('/etc/tls/ca.crt');

Path to TLS certificate authority file, defaults to the value of the MOJO_CA_FILE environment variable. Also activates hostname verification.

# Show certificate authorities for debugging
IO::Socket::SSL::set_defaults(
  SSL_verify_callback => sub { say "Authority: $_[2]" and return $_[0] });

cert

my $cert = $ua->cert;
$ua      = $ua->cert('/etc/tls/client.crt');

Path to TLS certificate file, defaults to the value of the MOJO_CERT_FILE environment variable.

connect_timeout

my $timeout = $ua->connect_timeout;
$ua         = $ua->connect_timeout(5);

Maximum amount of time in seconds establishing a connection may take before getting canceled, defaults to the value of the MOJO_CONNECT_TIMEOUT environment variable or 10.

cookie_jar

my $cookie_jar = $ua->cookie_jar;
$ua            = $ua->cookie_jar(Mojo::UserAgent::CookieJar->new);

Cookie jar to use for this user agents requests, defaults to a Mojo::UserAgent::CookieJar object.

# Disable cookie jar
$ua->cookie_jar(0);

inactivity_timeout

my $timeout = $ua->inactivity_timeout;
$ua         = $ua->inactivity_timeout(15);

Maximum amount of time in seconds a connection can be inactive before getting closed, defaults to the value of the MOJO_INACTIVITY_TIMEOUT environment variable or 20. Setting the value to 0 will allow connections to be inactive indefinitely.

ioloop

my $loop = $ua->ioloop;
$ua      = $ua->ioloop(Mojo::IOLoop->new);

Event loop object to use for blocking I/O operations, defaults to a Mojo::IOLoop object.

key

my $key = $ua->key;
$ua     = $ua->key('/etc/tls/client.crt');

Path to TLS key file, defaults to the value of the MOJO_KEY_FILE environment variable.

local_address

my $address = $ua->local_address;
$ua         = $ua->local_address('127.0.0.1');

Local address to bind to.

max_connections

my $max = $ua->max_connections;
$ua     = $ua->max_connections(5);

Maximum number of keep-alive connections that the user agent will retain before it starts closing the oldest ones, defaults to 5.

max_redirects

my $max = $ua->max_redirects;
$ua     = $ua->max_redirects(3);

Maximum number of redirects the user agent will follow before it fails, defaults to the value of the MOJO_MAX_REDIRECTS environment variable or 0.

proxy

my $proxy = $ua->proxy;
$ua       = $ua->proxy(Mojo::UserAgent::Proxy->new);

Proxy manager, defaults to a Mojo::UserAgent::Proxy object.

# Detect proxy servers from environment
$ua->proxy->detect;

request_timeout

my $timeout = $ua->request_timeout;
$ua         = $ua->request_timeout(5);

Maximum amount of time in seconds establishing a connection, sending the request and receiving a whole response may take before getting canceled, defaults to the value of the MOJO_REQUEST_TIMEOUT environment variable or 0. Setting the value to 0 will allow the user agent to wait indefinitely. The timeout will reset for every followed redirect.

# Total limit of 5 seconds, of which 3 seconds may be spent connecting
$ua->max_redirects(0)->connect_timeout(3)->request_timeout(5);

server

my $server = $ua->server;
$ua        = $ua->server(Mojo::UserAgent::Server->new);

Application server relative URLs will be processed with, defaults to a Mojo::UserAgent::Server object.

# Introspect
say $ua->server->app->secret;

# Change log level
$ua->server->app->log->level('fatal');

# Port currently used for processing relative URLs
say $ua->server->url->port;

transactor

my $t = $ua->transactor;
$ua   = $ua->transactor(Mojo::UserAgent::Transactor->new);

Transaction builder, defaults to a Mojo::UserAgent::Transactor object.

# Change name of user agent
$ua->transactor->name('MyUA 1.0');

METHODS

Mojo::UserAgent inherits all methods from Mojo::EventEmitter and implements the following new ones.

build_tx

my $tx = $ua->build_tx(GET => 'example.com');
my $tx = $ua->build_tx(PUT => 'http://example.com' => {DNT => 1} => 'Hi!');
my $tx = $ua->build_tx(
  PUT => 'http://example.com' => {DNT => 1} => form => {a => 'b'});
my $tx = $ua->build_tx(
  PUT => 'http://example.com' => {DNT => 1} => json => {a => 'b'});

Generate Mojo::Transaction::HTTP object with "tx" in Mojo::UserAgent::Transactor.

# Request with cookie
my $tx = $ua->build_tx(GET => 'example.com');
$tx->req->cookies({name => 'foo', value => 'bar'});
$ua->start($tx);

build_websocket_tx

my $tx = $ua->build_websocket_tx('ws://example.com');
my $tx = $ua->build_websocket_tx(
  'ws://example.com' => {DNT => 1} => ['v1.proto']);

Generate Mojo::Transaction::HTTP object with "websocket" in Mojo::UserAgent::Transactor.

delete

my $tx = $ua->delete('example.com');
my $tx = $ua->delete('http://example.com' => {DNT => 1} => 'Hi!');
my $tx = $ua->delete(
  'http://example.com' => {DNT => 1} => form => {a => 'b'});
my $tx = $ua->delete(
  'http://example.com' => {DNT => 1} => json => {a => 'b'});

Perform blocking DELETE request and return resulting Mojo::Transaction::HTTP object, takes the same arguments as "tx" in Mojo::UserAgent::Transactor (except for the method). You can also append a callback to perform requests non-blocking.

$ua->delete('http://example.com' => sub {
  my ($ua, $tx) = @_;
  say $tx->res->body;
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

get

my $tx = $ua->get('example.com');
my $tx = $ua->get('http://example.com' => {DNT => 1} => 'Hi!');
my $tx = $ua->get('http://example.com' => {DNT => 1} => form => {a => 'b'});
my $tx = $ua->get('http://example.com' => {DNT => 1} => json => {a => 'b'});

Perform blocking GET request and return resulting Mojo::Transaction::HTTP object, takes the same arguments as "tx" in Mojo::UserAgent::Transactor (except for the method). You can also append a callback to perform requests non-blocking.

$ua->get('http://example.com' => sub {
  my ($ua, $tx) = @_;
  say $tx->res->body;
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

head

my $tx = $ua->head('example.com');
my $tx = $ua->head('http://example.com' => {DNT => 1} => 'Hi!');
my $tx = $ua->head(
  'http://example.com' => {DNT => 1} => form => {a => 'b'});
my $tx = $ua->head(
  'http://example.com' => {DNT => 1} => json => {a => 'b'});

Perform blocking HEAD request and return resulting Mojo::Transaction::HTTP object, takes the same arguments as "tx" in Mojo::UserAgent::Transactor (except for the method). You can also append a callback to perform requests non-blocking.

$ua->head('http://example.com' => sub {
  my ($ua, $tx) = @_;
  say $tx->res->body;
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

options

my $tx = $ua->options('example.com');
my $tx = $ua->options('http://example.com' => {DNT => 1} => 'Hi!');
my $tx = $ua->options(
  'http://example.com' => {DNT => 1} => form => {a => 'b'});
my $tx = $ua->options(
  'http://example.com' => {DNT => 1} => json => {a => 'b'});

Perform blocking OPTIONS request and return resulting Mojo::Transaction::HTTP object, takes the same arguments as "tx" in Mojo::UserAgent::Transactor (except for the method). You can also append a callback to perform requests non-blocking.

$ua->options('http://example.com' => sub {
  my ($ua, $tx) = @_;
  say $tx->res->body;
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

patch

my $tx = $ua->patch('example.com');
my $tx = $ua->patch('http://example.com' => {DNT => 1} => 'Hi!');
my $tx = $ua->patch(
  'http://example.com' => {DNT => 1} => form => {a => 'b'});
my $tx = $ua->patch(
  'http://example.com' => {DNT => 1} => json => {a => 'b'});

Perform blocking PATCH request and return resulting Mojo::Transaction::HTTP object, takes the same arguments as "tx" in Mojo::UserAgent::Transactor (except for the method). You can also append a callback to perform requests non-blocking.

$ua->patch('http://example.com' => sub {
  my ($ua, $tx) = @_;
  say $tx->res->body;
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

post

my $tx = $ua->post('example.com');
my $tx = $ua->post('http://example.com' => {DNT => 1} => 'Hi!');
my $tx = $ua->post(
  'http://example.com' => {DNT => 1} => form => {a => 'b'});
my $tx = $ua->post(
  'http://example.com' => {DNT => 1} => json => {a => 'b'});

Perform blocking POST request and return resulting Mojo::Transaction::HTTP object, takes the same arguments as "tx" in Mojo::UserAgent::Transactor (except for the method). You can also append a callback to perform requests non-blocking.

$ua->post('http://example.com' => sub {
  my ($ua, $tx) = @_;
  say $tx->res->body;
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

put

my $tx = $ua->put('example.com');
my $tx = $ua->put('http://example.com' => {DNT => 1} => 'Hi!');
my $tx = $ua->put('http://example.com' => {DNT => 1} => form => {a => 'b'});
my $tx = $ua->put('http://example.com' => {DNT => 1} => json => {a => 'b'});

Perform blocking PUT request and return resulting Mojo::Transaction::HTTP object, takes the same arguments as "tx" in Mojo::UserAgent::Transactor (except for the method). You can also append a callback to perform requests non-blocking.

$ua->put('http://example.com' => sub {
  my ($ua, $tx) = @_;
  say $tx->res->body;
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

start

my $tx = $ua->start(Mojo::Transaction::HTTP->new);

Perform blocking request. You can also append a callback to perform requests non-blocking.

my $tx = $ua->build_tx(GET => 'http://example.com');
$ua->start($tx => sub {
  my ($ua, $tx) = @_;
  say $tx->res->body;
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

websocket

$ua->websocket('ws://example.com' => sub {...});
$ua->websocket(
  'ws://example.com' => {DNT => 1} => ['v1.proto'] => sub {...});

Open a non-blocking WebSocket connection with transparent handshake, takes the same arguments as "websocket" in Mojo::UserAgent::Transactor. The callback will receive either a Mojo::Transaction::WebSocket or Mojo::Transaction::HTTP object.

$ua->websocket('ws://example.com/echo' => sub {
  my ($ua, $tx) = @_;
  say 'WebSocket handshake failed!' and return unless $tx->is_websocket;
  $tx->on(finish => sub {
    my ($tx, $code, $reason) = @_;
    say "WebSocket closed with status $code.";
  });
  $tx->on(message => sub {
    my ($tx, $msg) = @_;
    say "WebSocket message: $msg";
    $tx->finish;
  });
  $tx->send('Hi!');
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

DEBUGGING

You can set the MOJO_USERAGENT_DEBUG environment variable to get some advanced diagnostics information printed to STDERR.

MOJO_USERAGENT_DEBUG=1

	Global
`s`	Focus search bar
`?`	Bring up this help dialog

	GitHub
`g` `p`	Go to pull requests
`g` `i`	go to github issues (only if github is preferred repository)

	POD
`g` `a`	Go to author
`g` `c`	Go to changes
`g` `i`	Go to issues
`g` `d`	Go to dist
`g` `r`	Go to repository/SCM
`g` `s`	Go to source
`g` `b`	Go to file browse

	Search terms
module: (e.g. module:Plugin)
distribution: (e.g. distribution:Dancer auth)
author: (e.g. author:SONGMU Redis)
version: (e.g. version:1.00)

NAME

SYNOPSIS

DESCRIPTION

EVENTS

error

start

ATTRIBUTES

ca

cert

connect_timeout

cookie_jar

inactivity_timeout

ioloop

key

local_address

max_connections

max_redirects

proxy

request_timeout

server

transactor

METHODS

build_tx

build_websocket_tx

delete

get

head

options

patch

post

put

start

websocket

DEBUGGING

SEE ALSO

Module Install Instructions