Class: Curl::Multi

Inherits:

Object

• Object
• Curl::Multi

Defined in:

ext/curb_multi.c

Class Method Summary

• .Curl::Multi.new ⇒ #<Curl::Easy...>

  Create a new Curl::Multi instance.

Instance Method Summary

• #add(easy) ⇒ Object

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

• #perform ⇒ Object

  multi = Curl::Multi.new easy1 = Curl::Easy.new(‘url’) easy2 = Curl::Easy.new(‘url’).

• #remove(easy) ⇒ Object

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

Class Method Details

.Curl::Multi.new ⇒ #<Curl::Easy...>

Create a new Curl::Multi instance

Returns:

• (#<Curl::Easy...>)

# File 'ext/curb_multi.c', line 55

static VALUE ruby_curl_multi_new(VALUE self) {
  VALUE new_curlm;
  
  ruby_curl_multi *rbcm = ALLOC(ruby_curl_multi);

  rbcm->handle = curl_multi_init();

  rbcm->requests = rb_hash_new();

  rbcm->active = 0;
  rbcm->running = 0;
  
  new_curlm = Data_Wrap_Struct(cCurlMulti, curl_multi_mark, curl_multi_free, rbcm);

  return new_curlm;
}

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

# File 'ext/curb_multi.c', line 81

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

  Data_Get_Struct(self, ruby_curl_multi, rbcm);
  Data_Get_Struct(easy, ruby_curl_easy, rbce);

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

  /* save a pointer to self */
  rbce->self = easy;

  /* setup the easy handle */
  ruby_curl_easy_setup( rbce, &(rbce->bodybuf), &(rbce->headerbuf), &(rbce->curl_headers) );

  rbcm->active++;
  if (mcode == CURLM_CALL_MULTI_PERFORM) {
    curl_multi_perform(rbcm->handle, &(rbcm->running));
  }

  rb_hash_aset( rbcm->requests, rb_int_new((long)rbce->curl), easy );
  // active should equal INT2FIX(RHASH(rbcm->requests)->tbl->num_entries)

  if (rbcm->active > rbcm->running) {
    rb_curl_multi_read_info(self, rbcm->handle);
  }

  return self;
}

#perform ⇒ Object

multi = Curl::Multi.new easy1 = Curl::Easy.new(‘url’) easy2 = Curl::Easy.new(‘url’)

multi.add(easy1) multi.add(easy2)

multi.perform do

# while idle other code my execute here

end

Run multi handles, looping selecting when data can be transfered

# File 'ext/curb_multi.c', line 250

static VALUE ruby_curl_multi_perform(VALUE self) {
  CURLMcode mcode;
  ruby_curl_multi *rbcm;
  int maxfd, rc;
  fd_set fdread, fdwrite, fdexcep;

  long timeout;
  struct timeval tv = {0, 0};

  Data_Get_Struct(self, ruby_curl_multi, rbcm);
  //rb_gc_mark(self);

  rb_curl_multi_run( self, rbcm->handle, &(rbcm->running) );

  while(rbcm->running) { 
    FD_ZERO(&fdread);
    FD_ZERO(&fdwrite);
    FD_ZERO(&fdexcep);

    /* load the fd sets from the multi handle */
    mcode = curl_multi_fdset(rbcm->handle, &fdread, &fdwrite, &fdexcep, &maxfd);
    if (mcode != CURLM_OK) {
      raise_curl_multi_error_exception(mcode);
    }

    /* get the curl suggested time out */
    mcode = curl_multi_timeout(rbcm->handle, &timeout);
    if (mcode != CURLM_OK) {
      raise_curl_multi_error_exception(mcode);
    }

    if (timeout == 0) { /* no delay */
      rb_curl_multi_run( self, rbcm->handle, &(rbcm->running) );
      continue;
    }
    else if (timeout == -1) {
      timeout = 1; /* You must not wait too long 
                     (more than a few seconds perhaps) before 
                     you call curl_multi_perform() again */
    }

    if (rb_block_given_p()) {
      rb_yield(self);
    }
 
    tv.tv_sec = timeout / 1000;
    tv.tv_usec = (timeout * 1000) % 1000000;

    rc = rb_thread_select(maxfd+1, &fdread, &fdwrite, &fdexcep, &tv);
    if (rc < 0) {
      rb_raise(rb_eRuntimeError, "select(): %s", strerror(errno));
    }

    rb_curl_multi_run( self, rbcm->handle, &(rbcm->running) );

  }

  return Qnil;
}

#remove(easy) ⇒ 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

# File 'ext/curb_multi.c', line 129

static VALUE ruby_curl_multi_remove(VALUE self, VALUE easy) {
  ruby_curl_multi *rbcm;

  Data_Get_Struct(self, ruby_curl_multi, rbcm);

  rb_curl_multi_remove(rbcm,easy);
  // active should equal INT2FIX(RHASH(rbcm->requests)->tbl->num_entries)

  return self;
}