- Inheritance
- < Net::Protocol < Object
What Is This Library?
This library provides your program functions to access WWW documents via HTTP, Hyper Text Transfer Protocol version 1.1. For details of HTTP, refer [RFC2616] (www.ietf.org/rfc/rfc2616.txt).
Examples
Getting Document From WWW Server
Example 1: Simple GET+print
require 'net/http' Net::HTTP.get_print 'www.example.com', '/index.html'
Example 2: Simple GET+print by URL
require 'net/http' require 'uri' Net::HTTP.get_print URI.parse('http://www.example.com/index.html')
Example 3: More generic GET+print
require 'net/http' require 'uri' url = URI.parse('http://www.example.com/index.html') res = Net::HTTP.start(url.host, url.port) {|http| http.get('/index.html') } puts res.body
Example 4: More generic GET+print
require 'net/http' url = URI.parse('http://www.example.com/index.html') req = Net::HTTP::Get.new(url.path) res = Net::HTTP.start(url.host, url.port) {|http| http.request(req) } puts res.body
Posting Form Data
require 'net/http' require 'uri' #1: Simple POST res = Net::HTTP.post_form(URI.parse('http://www.example.com/search.cgi'), {'q'=>'ruby', 'max'=>'50'}) puts res.body #2: POST with basic authentication res = Net::HTTP.post_form(URI.parse('http://jack:pass@www.example.com/todo.cgi'), {'from'=>'2005-01-01', 'to'=>'2005-03-31'}) puts res.body #3: Detailed control url = URI.parse('http://www.example.com/todo.cgi') req = Net::HTTP::Post.new(url.path) req.basic_auth 'jack', 'pass' req.set_form_data({'from'=>'2005-01-01', 'to'=>'2005-03-31'}, ';') res = Net::HTTP.new(url.host, url.port).start {|http| http.request(req) } case res when Net::HTTPSuccess, Net::HTTPRedirection # OK else res.error! end
Accessing via Proxy
Net::HTTP.Proxy creates http proxy class. It has same methods of Net::HTTP but its instances always connect to proxy, instead of given host.
require 'net/http' proxy_addr = 'your.proxy.host' proxy_port = 8080 : Net::HTTP::Proxy(proxy_addr, proxy_port).start('www.example.com') {|http| # always connect to your.proxy.addr:8080 : }
Since Net::HTTP.Proxy returns Net::HTTP itself when proxy_addr is nil, there‘s no need to change code if there‘s proxy or not.
There are two additional parameters in Net::HTTP.Proxy which allow to specify proxy user name and password:
Net::HTTP::Proxy(proxy_addr, proxy_port, proxy_user = nil, proxy_pass = nil)
You may use them to work with authorization-enabled proxies:
require 'net/http' require 'uri' proxy_host = 'your.proxy.host' proxy_port = 8080 uri = URI.parse(ENV['http_proxy']) proxy_user, proxy_pass = uri.userinfo.split(/:/) if uri.userinfo Net::HTTP::Proxy(proxy_host, proxy_port, proxy_user, proxy_pass).start('www.example.com') {|http| # always connect to your.proxy.addr:8080 using specified username and password : }
Note that net/http never rely on HTTP_PROXY environment variable. If you want to use proxy, set it explicitly.
Following Redirection
require 'net/http' require 'uri' def fetch(uri_str, limit = 10) # You should choose better exception. raise ArgumentError, 'HTTP redirect too deep' if limit == 0 response = Net::HTTP.get_response(URI.parse(uri_str)) case response when Net::HTTPSuccess then response when Net::HTTPRedirection then fetch(response['location'], limit - 1) else response.error! end end print fetch('http://www.ruby-lang.org')
Net::HTTPSuccess and Net::HTTPRedirection is a HTTPResponse class. All HTTPResponse objects belong to its own response class which indicate HTTP result status. For details of response classes, see section "HTTP Response Classes".
Basic Authentication
require 'net/http' Net::HTTP.start('www.example.com') {|http| req = Net::HTTP::Get.new('/secret-page.html') req.basic_auth 'account', 'password' response = http.request(req) print response.body }
HTTP Request Classes
Here is HTTP request class hierarchy.
Net::HTTPRequest Net::HTTP::Get Net::HTTP::Head Net::HTTP::Post Net::HTTP::Put Net::HTTP::Proppatch Net::HTTP::Lock Net::HTTP::Unlock Net::HTTP::Options Net::HTTP::Propfind Net::HTTP::Delete Net::HTTP::Move Net::HTTP::Copy Net::HTTP::Mkcol Net::HTTP::Trace
HTTP Response Classes
Here is HTTP response class hierarchy. All classes are defined in Net module.
HTTPResponse HTTPUnknownResponse HTTPInformation # 1xx HTTPContinue # 100 HTTPSwitchProtocl # 101 HTTPSuccess # 2xx HTTPOK # 200 HTTPCreated # 201 HTTPAccepted # 202 HTTPNonAuthoritativeInformation # 203 HTTPNoContent # 204 HTTPResetContent # 205 HTTPPartialContent # 206 HTTPRedirection # 3xx HTTPMultipleChoice # 300 HTTPMovedPermanently # 301 HTTPFound # 302 HTTPSeeOther # 303 HTTPNotModified # 304 HTTPUseProxy # 305 HTTPTemporaryRedirect # 307 HTTPClientError # 4xx HTTPBadRequest # 400 HTTPUnauthorized # 401 HTTPPaymentRequired # 402 HTTPForbidden # 403 HTTPNotFound # 404 HTTPMethodNotAllowed # 405 HTTPNotAcceptable # 406 HTTPProxyAuthenticationRequired # 407 HTTPRequestTimeOut # 408 HTTPConflict # 409 HTTPGone # 410 HTTPLengthRequired # 411 HTTPPreconditionFailed # 412 HTTPRequestEntityTooLarge # 413 HTTPRequestURITooLong # 414 HTTPUnsupportedMediaType # 415 HTTPRequestedRangeNotSatisfiable # 416 HTTPExpectationFailed # 417 HTTPServerError # 5xx HTTPInternalServerError # 500 HTTPNotImplemented # 501 HTTPBadGateway # 502 HTTPServiceUnavailable # 503 HTTPGatewayTimeOut # 504 HTTPVersionNotSupported # 505
Switching Net::HTTP versions
You can use net/http.rb 1.1 features (bundled with Ruby 1.6) by calling HTTP.version_1_1. Calling Net::HTTP.version_1_2 allows you to use 1.2 features again.
# example Net::HTTP.start {|http1| ...(http1 has 1.2 features)... } Net::HTTP.version_1_1 Net::HTTP.start {|http2| ...(http2 has 1.1 features)... } Net::HTTP.version_1_2 Net::HTTP.start {|http3| ...(http3 has 1.2 features)... }
This function is NOT thread-safe.
Classes & Modules
- Net::HTTP::Copy
- Net::HTTP::Delete
- Net::HTTP::Get
- Net::HTTP::Head
- Net::HTTP::Lock
- Net::HTTP::Mkcol
- Net::HTTP::Move
- Net::HTTP::Options
- Net::HTTP::Post
- Net::HTTP::Propfind
- Net::HTTP::Proppatch
- Net::HTTP::Put
- Net::HTTP::Trace
- Net::HTTP::Unlock
Attributes
Name | Visibility | R/W | Description |
---|---|---|---|
address | public | R | The host name to connect to. |
close_on_empty_response | public | RW | |
open_timeout | public | RW | Seconds to wait until connection is opened. If the HTTP object cannot open a connection in this many seconds, it raises a TimeoutError exception. |
port | public | R | The port number to connect to. |
proxy_address | public | R | |
proxy_pass | public | R | |
proxy_port | public | R | |
proxy_user | public | R | |
read_timeout | public | R | Seconds to wait until reading one block (by one read(2) call). If the HTTP object cannot open a connection in this many seconds, it raises a TimeoutError exception. |
Aliases
Method | Alias | Description |
---|---|---|
new | → newobj | |
request_put | → put2 | |
version_1_1? | → is_version_1_1? | |
version_1_2? | → is_version_1_2? |
Methods
Class
Visibility | Signature |
---|---|
public | Proxy (p_addr, p_port = nil, p_user = nil, p_pass = nil) |
public | default_port () |
public | get (uri_or_host, path = nil, port = nil) |
public | get_print (uri_or_host, path = nil, port = nil) |
public | get_response (uri_or_host, path = nil, port = nil, &block) |
public | http_default_port () |
public | https_default_port () |
public | new (address, port = nil) |
public | new (address, port = nil, p_addr = nil, p_port = nil, p_user = nil, p_pass = nil) |
public | post_form (url, params) |
public | proxy_class? () |
public | ssl_context_accessor (name) |
public | start (address, port = nil, p_addr = nil, p_port = nil, p_user = nil, p_pass = nil) {|+http+| ...} |
public | version_1_1 () |
public | version_1_1? () |
public | version_1_2 () |
public | version_1_2? () |
Instance
Visibility | Signature |
---|---|
public | active? () |
public | copy (path, initheader = nil) |
public | delete (path, initheader = {'Depth' => 'Infinity'}) |
public | finish () |
public | get (path, initheader = nil, dest = nil) {|+body_segment+| ...} |
public | get2 (path, initheader = nil) |
public | head (path, initheader = nil) |
public | head2 (path, initheader = nil, &block) |
public | inspect () |
public | lock (path, body, initheader = nil) |
public | mkcol (path, body = nil, initheader = nil) |
public | move (path, initheader = nil) |
public | options (path, initheader = nil) |
public | peer_cert () |
public | post (path, data, initheader = nil, dest = nil) {|+body_segment+| ...} |
public | post2 (path, data, initheader = nil) |
public | propfind (path, body = nil, initheader = {'Depth' => '0'}) |
public | proppatch (path, body, initheader = nil) |
public | proxy? () |
public | proxy_address () |
public | proxy_pass () |
public | proxy_port () |
public | proxy_user () |
public | proxyaddr () |
public | proxyport () |
public | read_timeout= (sec) |
public | request (req, body = nil) {|+response+| ...} |
public | request_get (path, initheader = nil) {|+response+| ...} |
public | request_head (path, initheader = nil, &block) |
public | request_post (path, data, initheader = nil) {|+response+| ...} |
public | send_request (name, path, data = nil, header = nil) |
public | set_debug_output (output) |
public | ssl_timeout () |
public | ssl_timeout= (sec) |
public | start ( {|http| ...} |
public | started? () |
public | timeout= (sec) |
public | trace (path, initheader = nil) |
public | unlock (path, body, initheader = nil) |
public | use_ssl () |
public | use_ssl= (flag) |
public | use_ssl? () |
public | use_ssl? () |
Class Method Detail
Proxy(p_addr, p_port = nil, p_user = nil, p_pass = nil)
Creates an HTTP proxy class. Arguments are address/port of proxy host and username/password if authorization on proxy server is required. You can replace the HTTP class with created proxy class.
If ADDRESS is nil, this method returns self (Net::HTTP).
# Example proxy_class = Net::HTTP::Proxy('proxy.example.com', 8080) : proxy_class.start('www.ruby-lang.org') {|http| # connecting proxy.foo.org:8080 : }
default_port()
The default port to use for HTTP requests; defaults to 80.
get(uri_or_host, path = nil, port = nil)
Send a GET request to the target and return the response as a string. The target can either be specified as (uri), or as (host, path, port = 80); so:
print Net::HTTP.get(URI.parse('http://www.example.com/index.html'))
or:
print Net::HTTP.get('www.example.com', '/index.html')
get_print(uri_or_host, path = nil, port = nil)
Get body from target and output it to +$stdout+. The target can either be specified as (uri), or as (host, path, port = 80); so:
Net::HTTP.get_print URI.parse('http://www.example.com/index.html')
or:
Net::HTTP.get_print 'www.example.com', '/index.html'
get_response(uri_or_host, path = nil, port = nil, &block)
Send a GET request to the target and return the response as a Net::HTTPResponse object. The target can either be specified as (uri), or as (host, path, port = 80); so:
res = Net::HTTP.get_response(URI.parse('http://www.example.com/index.html')) print res.body
or:
res = Net::HTTP.get_response('www.example.com', '/index.html') print res.body
http_default_port()
The default port to use for HTTP requests; defaults to 80.
https_default_port()
The default port to use for HTTPS requests; defaults to 443.
new(address, port = nil)
Creates a new Net::HTTP object for the specified address. This method does not open the TCP connection.
new(address, port = nil, p_addr = nil, p_port = nil, p_user = nil, p_pass = nil)
Creates a new Net::HTTP object. If proxy_addr is given, creates an Net::HTTP object with proxy support. This method does not open the TCP connection.
post_form(url, params)
Posts HTML form data to the URL. Form data must be represented as a Hash of String to String, e.g:
{ "cmd" => "search", "q" => "ruby", "max" => "50" }
This method also does Basic Authentication iff URL.user exists.
Example:
require 'net/http' require 'uri' HTTP.post_form URI.parse('http://www.example.com/search.cgi'), { "q" => "ruby", "max" => "50" }
proxy_class?()
returns true if self is a class which was created by HTTP::Proxy.
ssl_context_accessor(name)
start(address, port = nil, p_addr = nil, p_port = nil, p_user = nil, p_pass = nil) {|+http+| ...}
creates a new Net::HTTP object and opens its TCP connection and HTTP session. If the optional block is given, the newly created Net::HTTP object is passed to it and closed when the block finishes. In this case, the return value of this method is the return value of the block. If no block is given, the return value of this method is the newly created Net::HTTP object itself, and the caller is responsible for closing it upon completion.
version_1_1()
Turns on net/http 1.1 (ruby 1.6) features. Defaults to OFF in ruby 1.8.
version_1_1?()
true if net/http is in version 1.1 compatible mode. Defaults to true.
version_1_2()
Turns on net/http 1.2 (ruby 1.8) features. Defaults to ON in ruby 1.8.
I strongly recommend to call this method always.
require 'net/http' Net::HTTP.version_1_2
version_1_2?()
true if net/http is in version 1.2 mode. Defaults to true.
Instance Method Detail
active?()
Alias for started?
copy(path, initheader = nil)
Sends a COPY request to the path and gets a response, as an HTTPResponse object.
delete(path, initheader = {'Depth' => 'Infinity'})
Sends a DELETE request to the path and gets a response, as an HTTPResponse object.
finish()
get(path, initheader = nil, dest = nil) {|+body_segment+| ...}
Gets data from path on the connected-to host. header must be a Hash like { ‘Accept’ => ’*/*’, … }.
In version 1.1 (ruby 1.6), this method returns a pair of objects, a Net::HTTPResponse object and the entity body string. In version 1.2 (ruby 1.8), this method returns a Net::HTTPResponse object.
If called with a block, yields each fragment of the entity body in turn as a string as it is read from the socket. Note that in this case, the returned response object will not contain a (meaningful) body.
dest argument is obsolete. It still works but you must not use it.
In version 1.1, this method might raise an exception for 3xx (redirect). In this case you can get a HTTPResponse object by "anException.response".
In version 1.2, this method never raises exception.
# version 1.1 (bundled with Ruby 1.6) response, body = http.get('/index.html') # version 1.2 (bundled with Ruby 1.8 or later) response = http.get('/index.html') # using block File.open('result.txt', 'w') {|f| http.get('/~foo/') do |str| f.write str end }
get2(path, initheader = nil)
Alias for request_get
head(path, initheader = nil)
Gets only the header from path on the connected-to host. header is a Hash like { ‘Accept’ => ’*/*’, … }.
This method returns a Net::HTTPResponse object.
In version 1.1, this method might raise an exception for 3xx (redirect). On the case you can get a HTTPResponse object by "anException.response". In version 1.2, this method never raises an exception.
response = nil Net::HTTP.start('some.www.server', 80) {|http| response = http.head('/index.html') } p response['content-type']
head2(path, initheader = nil, &block)
Alias for request_head
inspect()
lock(path, body, initheader = nil)
Sends a LOCK request to the path and gets a response, as an HTTPResponse object.
mkcol(path, body = nil, initheader = nil)
Sends a MKCOL request to the path and gets a response, as an HTTPResponse object.
move(path, initheader = nil)
Sends a MOVE request to the path and gets a response, as an HTTPResponse object.
options(path, initheader = nil)
Sends a OPTIONS request to the path and gets a response, as an HTTPResponse object.
peer_cert()
post(path, data, initheader = nil, dest = nil) {|+body_segment+| ...}
Posts data (must be a String) to path. header must be a Hash like { ‘Accept’ => ’*/*’, … }.
In version 1.1 (ruby 1.6), this method returns a pair of objects, a Net::HTTPResponse object and an entity body string. In version 1.2 (ruby 1.8), this method returns a Net::HTTPResponse object.
If called with a block, yields each fragment of the entity body in turn as a string as it are read from the socket. Note that in this case, the returned response object will not contain a (meaningful) body.
dest argument is obsolete. It still works but you must not use it.
In version 1.1, this method might raise an exception for 3xx (redirect). In this case you can get an HTTPResponse object by "anException.response". In version 1.2, this method never raises exception.
# version 1.1 response, body = http.post('/cgi-bin/search.rb', 'query=foo') # version 1.2 response = http.post('/cgi-bin/search.rb', 'query=foo') # using block File.open('result.txt', 'w') {|f| http.post('/cgi-bin/search.rb', 'query=foo') do |str| f.write str end }
You should set Content-Type: header field for POST. If no Content-Type: field given, this method uses "application/x-www-form-urlencoded" by default.
post2(path, data, initheader = nil)
Alias for request_post
propfind(path, body = nil, initheader = {'Depth' => '0'})
Sends a PROPFIND request to the path and gets a response, as an HTTPResponse object.
proppatch(path, body, initheader = nil)
Sends a PROPPATCH request to the path and gets a response, as an HTTPResponse object.
proxy?()
True if self is a HTTP proxy class.
proxy_address()
Address of proxy host. If self does not use a proxy, nil.
proxy_pass()
User password for accessing proxy. If self does not use a proxy, nil.
proxy_port()
Port number of proxy host. If self does not use a proxy, nil.
proxy_user()
User name for accessing proxy. If self does not use a proxy, nil.
proxyaddr()
Alias for proxy_address
proxyport()
Alias for proxy_port
read_timeout=(sec)
Setter for the read_timeout attribute.
request(req, body = nil) {|+response+| ...}
Sends an HTTPRequest object REQUEST to the HTTP server. This method also sends DATA string if REQUEST is a post/put request. Giving DATA for get/head request causes ArgumentError.
When called with a block, yields an HTTPResponse object. The body of this response will not have been read yet; the caller can process it using HTTPResponse#read_body, if desired.
Returns a HTTPResponse object.
This method never raises Net::* exceptions.
request_get(path, initheader = nil) {|+response+| ...}
Sends a GET request to the path and gets a response, as an HTTPResponse object.
When called with a block, yields an HTTPResponse object. The body of this response will not have been read yet; the caller can process it using HTTPResponse#read_body, if desired.
Returns the response.
This method never raises Net::* exceptions.
response = http.request_get('/index.html') # The entity body is already read here. p response['content-type'] puts response.body # using block http.request_get('/index.html') {|response| p response['content-type'] response.read_body do |str| # read body now print str end }
request_head(path, initheader = nil, &block)
Sends a HEAD request to the path and gets a response, as an HTTPResponse object.
Returns the response.
This method never raises Net::* exceptions.
response = http.request_head('/index.html') p response['content-type']
request_post(path, data, initheader = nil) {|+response+| ...}
Sends a POST request to the path and gets a response, as an HTTPResponse object.
When called with a block, yields an HTTPResponse object. The body of this response will not have been read yet; the caller can process it using HTTPResponse#read_body, if desired.
Returns the response.
This method never raises Net::* exceptions.
# example response = http.request_post('/cgi-bin/nice.rb', 'datadatadata...') p response.status puts response.body # body is already read # using block http.request_post('/cgi-bin/nice.rb', 'datadatadata...') {|response| p response.status p response['content-type'] response.read_body do |str| # read body now print str end }
send_request(name, path, data = nil, header = nil)
Sends an HTTP request to the HTTP server. This method also sends DATA string if DATA is given.
Returns a HTTPResponse object.
This method never raises Net::* exceptions.
response = http.send_request('GET', '/index.html') puts response.body
set_debug_output(output)
WARNING This method causes serious security hole. Never use this method in production code.
Set an output stream for debugging.
http = Net::HTTP.new http.set_debug_output $stderr http.start { .... }
ssl_timeout()
ssl_timeout=(sec)
start( {|http| ...}
Opens TCP connection and HTTP session.
When this method is called with block, gives a HTTP object to the block and closes the TCP connection / HTTP session after the block executed.
When called with a block, returns the return value of the block; otherwise, returns self.
started?()
returns true if the HTTP session is started.
timeout=(sec)
Alias for ssl_timeout=
trace(path, initheader = nil)
Sends a TRACE request to the path and gets a response, as an HTTPResponse object.
unlock(path, body, initheader = nil)
Sends a UNLOCK request to the path and gets a response, as an HTTPResponse object.
use_ssl()
Alias for use_ssl?
use_ssl=(flag)
Turn on/off SSL. This flag must be set before starting session. If you change use_ssl value after session started, a Net::HTTP object raises IOError.
use_ssl?()
use_ssl?()
returns true if use SSL/TLS with HTTP.