Class: Curl::Multi

Inherits:
Object
  • Object
show all
Defined in:
lib/curl/multi.rb,
ext/curb_multi.c

Defined Under Namespace

Classes: DownloadError

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Object

Instance methods



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# File 'ext/curb_multi.c', line 414

static VALUE ruby_curl_multi_initialize(VALUE self) {
  ruby_curl_multi *rbcm;

  TypedData_Get_Struct(self, ruby_curl_multi, &ruby_curl_multi_data_type, rbcm);

  ruby_curl_multi_init(rbcm);

  /*
   * The mark routine will be called by the garbage collector during its ``mark'' phase.
   * If your structure references other Ruby objects, then your mark function needs to
   * identify these objects using rb_gc_mark(value). If the structure doesn't reference
   * other Ruby objects, you can simply pass 0 as a function pointer.
   */
  return self;
}

Class Method Details

.Curl::Multi.autoclose ⇒ Object

Get the global default autoclose setting for all Curl::Multi Handles.



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# File 'ext/curb_multi.c', line 474

VALUE ruby_curl_multi_get_autoclose(VALUE klass) {
  return cCurlMutiAutoClose == 1 ? Qtrue : Qfalse;
}

.Curl::Multi.autoclose( = true) ⇒ true

Automatically close open connections after each request. Otherwise, the connection will remain open for reuse until the next GC

Returns:

  • (true) 


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# File 'ext/curb_multi.c', line 462

VALUE ruby_curl_multi_set_autoclose(VALUE klass, VALUE onoff) {
  cCurlMutiAutoClose = ((onoff == Qtrue) ? 1 : 0);
  return onoff;
}

.Curl::Multi.default_timeout( = 4) ⇒ 4

Get the global default time out for all Curl::Multi Handles.

Returns:

  • (4) 


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# File 'ext/curb_multi.c', line 450

VALUE ruby_curl_multi_get_default_timeout(VALUE klass) {
  return LONG2NUM(cCurlMutiDefaulttimeout);
}

.Curl::Multi.default_timeout( = 4) ⇒ 4

Set the global default time out for all Curl::Multi Handles. This value is used when libcurl cannot determine a timeout value when calling curl_multi_timeout.

Returns:

  • (4) 


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# File 'ext/curb_multi.c', line 438

VALUE ruby_curl_multi_set_default_timeout(VALUE klass, VALUE timeout) {
  cCurlMutiDefaulttimeout = NUM2LONG(timeout);
  return timeout;
}

.download(urls, easy_options = {}, multi_options = {}, download_paths = nil, &blk) ⇒ Object

call-seq:

Curl::Multi.download(){|c|}

will create 2 new files file1.txt and file2.txt

2 files will be opened, and remain open until the call completes

when using the :post or :put method, urls should be a hash, including the individual post fields per post



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# File 'lib/curl/multi.rb', line 191

def download(urls,easy_options={},multi_options={},download_paths=nil,&blk)
  errors = []
  procs = []
  files = []
  urls_with_config = []
  url_to_download_paths = {}

  urls.each_with_index do|urlcfg,i|
    if urlcfg.is_a?(Hash)
      url = url[:url]
    else
      url = urlcfg
    end

    if download_paths and download_paths[i]
      download_path = download_paths[i]
    else
      download_path = File.basename(url)
    end

    file = lambda do|dp|
      file = File.open(dp,"wb")
      procs << (lambda {|data| file.write data; data.size })
      files << file
      file
    end.call(download_path)

    if urlcfg.is_a?(Hash)
      urls_with_config << urlcfg.merge({:on_body => procs.last}.merge(easy_options))
    else
      urls_with_config << {:url => url, :on_body => procs.last, :method => :get}.merge(easy_options)
    end
    url_to_download_paths[url] = {:path => download_path, :file => file} # store for later
  end

  if blk
    # when injecting the block, ensure file is closed before yielding
    Curl::Multi.http(urls_with_config, multi_options) do |c,code,method|
      info = url_to_download_paths[c.url]
      begin
        file = info[:file]
        files.reject!{|f| f == file }
        file.close
      rescue => e
        errors << e
      end
      blk.call(c,info[:path])
    end
  else
    Curl::Multi.http(urls_with_config, multi_options)
  end

ensure
  files.each {|f|
    begin
      f.close
    rescue => e
      errors << e
    end
  }
  if errors.any?
    de = Curl::Multi::DownloadError.new
    de.errors = errors
    raise de
  end
end

.get(urls, easy_options = {}, multi_options = {}, &blk) ⇒ Object

call-seq:

Curl::Multi.get(['url1','url2','url3','url4','url5'], :follow_location => true) do|easy|
  easy
end

Blocking call to fetch multiple url’s in parallel.



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# File 'lib/curl/multi.rb', line 14

def get(urls, easy_options={}, multi_options={}, &blk)
  url_confs = []
  urls.each do|url|
    url_confs << {:url => url, :method => :get}.merge(easy_options)
  end
  self.http(url_confs, multi_options) {|c,code,method| blk.call(c) if blk }
end

.http(urls_with_config, multi_options = {}, &blk) ⇒ Object

call-seq:

Curl::Multi.http( [

{ :url => 'url1', :method => :post,
  :post_fields => {'field1' => 'value1', 'field2' => 'value2'} },
{ :url => 'url2', :method => :get,
  :follow_location => true, :max_redirects => 3 },
{ :url => 'url3', :method => :put, :put_data => File.open('file.txt','rb') },
{ :url => 'url4', :method => :head }

], => Curl::CURLPIPE_HTTP1)

Blocking call to issue multiple HTTP requests with varying verb’s.

urls_with_config: is a hash of url’s pointing to the easy handle options as well as the special option :method, that can by one of [:get, :post, :put, :delete, :head], when no verb is provided e.g. :method => nil -> GET is used multi_options: options for the multi handle blk: a callback, that yeilds when a handle is completed



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# File 'lib/curl/multi.rb', line 88

def http(urls_with_config, multi_options={}, &blk)
  m = Curl::Multi.new

  # maintain a sane number of easy handles
  multi_options[:max_connects] = max_connects = multi_options.key?(:max_connects) ? multi_options[:max_connects] : 10

  free_handles = [] # keep a list of free easy handles

  # configure the multi handle
  multi_options.each { |k,v| m.send("#{k}=", v) }
  callbacks = [:on_progress,:on_debug,:on_failure,:on_success,:on_redirect,:on_missing,:on_body,:on_header]

  add_free_handle = proc do|conf, easy|
    c       = conf.dup # avoid being destructive to input
    url     = c.delete(:url)
    method  = c.delete(:method)
    headers = c.delete(:headers)

    easy    = Curl::Easy.new if easy.nil?

    easy.url = url

    # assign callbacks
    callbacks.each do |cb|
      cbproc = c.delete(cb)
      easy.send(cb,&cbproc) if cbproc
    end

    case method
    when :post
      fields = c.delete(:post_fields)
      # set the post post using the url fields
      easy.post_body = fields.map{|f,k| "#{easy.escape(f)}=#{easy.escape(k)}"}.join('&')
    when :put
      easy.put_data = c.delete(:put_data)
    when :head
      easy.head = true
    when :delete
      easy.delete = true
    when :get
    else
      # XXX: nil is treated like a GET
    end

    # headers is a special key
    headers.each {|k,v| easy.headers[k] = v } if headers

    #
    # use the remaining options as specific configuration to the easy handle
    # bad options should raise an undefined method error
    #
    c.each { |k,v| easy.send("#{k}=",v) }

    easy.on_complete {|curl|
      free_handles << curl
      blk.call(curl,curl.response_code,method) if blk
    }
    m.add(easy)
  end

  max_connects.times do
    conf = urls_with_config.pop
    add_free_handle.call(conf, nil) if conf
    break if urls_with_config.empty?
  end

  consume_free_handles = proc do
    # as we idle consume free handles
    if urls_with_config.size > 0 && free_handles.size > 0
      easy = free_handles.pop
      conf = urls_with_config.pop
      add_free_handle.call(conf, easy) if conf
    end
  end

  begin
    if urls_with_config.empty?
      m.perform
    else
      until urls_with_config.empty?
        m.perform do
          consume_free_handles.call
        end
        consume_free_handles.call
      end
      free_handles = nil
    end
  ensure
    m.close
  end

end

.post(urls_with_config, easy_options = {}, multi_options = {}, &blk) ⇒ Object

call-seq:

Curl::Multi.post([{:url => 'url1', :post_fields => {'field1' => 'value1', 'field2' => 'value2'}},
                  {:url => 'url2', :post_fields => {'field1' => 'value1', 'field2' => 'value2'}},
                  {:url => 'url3', :post_fields => {'field1' => 'value1', 'field2' => 'value2'}}],
                 { :follow_location => true, :multipart_form_post => true },
                 {:pipeline => Curl::CURLPIPE_HTTP1}) do|easy|
  easy_handle_on_request_complete
end

Blocking call to POST multiple form’s in parallel.

urls_with_config: is a hash of url’s pointing to the postfields to send easy_options: are a set of common options to set on all easy handles multi_options: options to set on the Curl::Multi handle



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# File 'lib/curl/multi.rb', line 38

def post(urls_with_config, easy_options={}, multi_options={}, &blk)
  url_confs = []
  urls_with_config.each do|uconf|
    url_confs << uconf.merge(:method => :post).merge(easy_options)
  end
  self.http(url_confs, multi_options) {|c,code,method| blk.call(c) }
end

.put(urls_with_config, easy_options = {}, multi_options = {}, &blk) ⇒ Object

call-seq:

Curl::Multi.put([{:url => 'url1', :put_data => "some message"},
                 {:url => 'url2', :put_data => IO.read('filepath')},
                 {:url => 'url3', :put_data => "maybe another string or socket?"],
                 {:follow_location => true},
                 {:pipeline => Curl::CURLPIPE_HTTP1}) do|easy|
  easy_handle_on_request_complete
end

Blocking call to POST multiple form’s in parallel.

urls_with_config: is a hash of url’s pointing to the postfields to send easy_options: are a set of common options to set on all easy handles multi_options: options to set on the Curl::Multi handle



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# File 'lib/curl/multi.rb', line 62

def put(urls_with_config, easy_options={}, multi_options={}, &blk)
  url_confs = []
  urls_with_config.each do|uconf|
    url_confs << uconf.merge(:method => :put).merge(easy_options)
  end
  self.http(url_confs, multi_options) {|c,code,method| blk.call(c) }
end

Instance Method Details

#_add(easy) ⇒ Object

multi = Curl::Multi.new easy = Curl::Easy.new(‘url’)

multi.add(easy)

Add an easy handle to the multi stack



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# File 'ext/curb_multi.c', line 566

VALUE ruby_curl_multi_add(VALUE self, VALUE easy) {
  CURLMcode mcode;
  ruby_curl_easy *rbce;
  ruby_curl_multi *rbcm;
  ruby_curl_multi *existing_rbcm;

  TypedData_Get_Struct(self, ruby_curl_multi, &ruby_curl_multi_data_type, rbcm);
  TypedData_Get_Struct(easy, ruby_curl_easy, &ruby_curl_easy_data_type, rbce);
  ruby_curl_multi_ensure_handle(rbcm);

  if (rb_curl_multi_has_easy(rbcm, rbce)) {
    return self;
  }

  existing_rbcm = ruby_curl_multi_pointer_if_compatible(rbce->multi);
  if (existing_rbcm && existing_rbcm != rbcm && rb_curl_multi_has_easy(existing_rbcm, rbce)) {
    rb_raise(rb_eRuntimeError, "Cannot add an active Curl::Easy handle to another Curl::Multi");
  }

  /* setup the easy handle */
  ruby_curl_easy_setup( rbce );

  mcode = curl_multi_add_handle(rbcm->handle, rbce->curl);
  if (mcode != CURLM_CALL_MULTI_PERFORM && mcode != CURLM_OK) {
    ruby_curl_easy_cleanup(easy, rbce);

    raise_curl_multi_error_exception(mcode);
  }

  rbcm->active++;

  /* Increase the running count, so that the perform loop keeps running.
   * If this number is not correct, the next call to curl_multi_perform will correct it. */
  rbcm->running++;

  if (!rbcm->attached) {
    rbcm->attached = st_init_numtable();
    if (!rbcm->attached) {
      curl_multi_remove_handle(rbcm->handle, rbce->curl);
      ruby_curl_easy_cleanup(easy, rbce);
      rb_raise(rb_eNoMemError, "Failed to allocate multi attachment table");
    }
  }

  rbce->multi_attachment_generation++;
  st_insert(rbcm->attached, (st_data_t)rbce, (st_data_t)easy);

  /* track a reference to associated multi handle */
  rbce->multi = self;

  return self;
}

#_close ⇒ Object

multi.close after closing the multi handle all connections will be closed and the handle will no longer be usable



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# File 'ext/curb_multi.c', line 1900

VALUE ruby_curl_multi_close(VALUE self) {
  ruby_curl_multi *rbcm;
  TypedData_Get_Struct(self, ruby_curl_multi, &ruby_curl_multi_data_type, rbcm);

  if ((rbcm->perform_active || rbcm->callback_active) && !rbcm->allow_close_during_perform) {
    rb_raise(rb_eRuntimeError, "Cannot close an active Curl::Multi handle during perform");
  }

  rb_curl_multi_detach_all(rbcm);

  if (rbcm->handle) {
    curl_multi_cleanup(rbcm->handle);
    rbcm->handle = NULL;
  }

  rbcm->active = 0;
  rbcm->running = 0;
  clear_multi_deferred_exception_if_any(self);
  clear_multi_deferred_exception_source_id_if_any(self);
  return self;
}

#_remove(rb_easy_handle) ⇒ Object

multi = Curl::Multi.new easy = Curl::Easy.new(‘url’)

multi.add(easy)

# sometime later multi.remove(easy)

Remove an easy handle from a multi stack.

Will raise an exception if the easy handle is not found



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# File 'ext/curb_multi.c', line 633

VALUE ruby_curl_multi_remove(VALUE self, VALUE rb_easy_handle) {
  ruby_curl_multi *rbcm;

  TypedData_Get_Struct(self, ruby_curl_multi, &ruby_curl_multi_data_type, rbcm);

  rb_curl_multi_remove(rbcm, rb_easy_handle);

  return self;
}

#add(easy) ⇒ Object 



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# File 'lib/curl/multi.rb', line 312

def add(easy)
  return self if requests[easy.object_id]
  # Once a deferred callback exception is pending, Multi#perform is
  # draining existing transfers only and must not start replacement work.
  return self if instance_variable_defined?(:@__curb_deferred_exception)
  _add(easy)
  __unregister_idle_easy_reference(easy)
  requests[easy.object_id] = easy
  self
end

#cancel! ⇒ Object 



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# File 'lib/curl/multi.rb', line 259

def cancel!
  requests.each do |_,easy|
    remove(easy)
  end
end

#close ⇒ Object 



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# File 'lib/curl/multi.rb', line 330

def close
  __close(true)
end

#idle? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/curl/multi.rb', line 265

def idle?
  requests.empty?
end

#max_connects=(count) ⇒ Object

multi = Curl::Multi.new multi.max_connects = 800

Set the max connections in the cache for a multi handle



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# File 'ext/curb_multi.c', line 491

static VALUE ruby_curl_multi_max_connects(VALUE self, VALUE count) {
#ifdef HAVE_CURLMOPT_MAXCONNECTS
  ruby_curl_multi *rbcm;

  TypedData_Get_Struct(self, ruby_curl_multi, &ruby_curl_multi_data_type, rbcm);
  ruby_curl_multi_ensure_handle(rbcm);

  curl_multi_setopt(rbcm->handle, CURLMOPT_MAXCONNECTS, NUM2LONG(count));
#endif

  return count;
}

#max_host_connections=(count) ⇒ Object

multi = Curl::Multi.new multi.max_host_connections = 1

Set the max number of connections per host



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# File 'ext/curb_multi.c', line 511

static VALUE ruby_curl_multi_max_host_connections(VALUE self, VALUE count) {
#ifdef HAVE_CURLMOPT_MAX_HOST_CONNECTIONS
  ruby_curl_multi *rbcm;

  TypedData_Get_Struct(self, ruby_curl_multi, &ruby_curl_multi_data_type, rbcm);
  ruby_curl_multi_ensure_handle(rbcm);

  curl_multi_setopt(rbcm->handle, CURLMOPT_MAX_HOST_CONNECTIONS, NUM2LONG(count));
#endif

  return count;
}

#perform(*args) ⇒ Object

The legacy fdset loop is the stable default. The newer socket-action path is kept in-tree, but it has shown scheduler regressions for one-handle multi usage (for example Curl::Easy#perform under Async).



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# File 'ext/curb_multi.c', line 1883

VALUE ruby_curl_multi_perform(int argc, VALUE *argv, VALUE self) {
  return ruby_curl_multi_with_perform_guard(argc, argv, self, ruby_curl_multi_perform_impl);
}

#pipeline=(method) ⇒ Object

multi = Curl::Multi.new multi.pipeline = true

Pass a long set to 1 for HTTP/1.1 pipelining, 2 for HTTP/2 multiplexing, or 0 to disable.

Enabling pipelining on a multi handle will make it attempt to perform HTTP Pipelining as

far as possible for transfers using this handle. This means that if you add a second request that can use an already existing connection, the second request will be “piped” on the same connection rather than being executed in parallel. (Added in 7.16.0, multiplex added in 7.43.0)



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# File 'ext/curb_multi.c', line 536

static VALUE ruby_curl_multi_pipeline(VALUE self, VALUE method) {
#ifdef HAVE_CURLMOPT_PIPELINING
  ruby_curl_multi *rbcm;

  long value;

  if (method == Qtrue) {
    value = 1;
  } else if (method == Qfalse) {
    value  = 0;
  } else {
    value = NUM2LONG(method);
  } 

  TypedData_Get_Struct(self, ruby_curl_multi, &ruby_curl_multi_data_type, rbcm);
  ruby_curl_multi_ensure_handle(rbcm);
  curl_multi_setopt(rbcm->handle, CURLMOPT_PIPELINING, value);
#endif
  return method == Qtrue ? 1 : 0;
}

#remove(easy) ⇒ Object 



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# File 'lib/curl/multi.rb', line 323

def remove(easy)
  return self if !requests[easy.object_id]
  requests.delete(easy.object_id)
  _remove(easy)
  self
end

#requests ⇒ Object 



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# File 'lib/curl/multi.rb', line 269

def requests
  @requests ||= {}
end