Class: Thin::HttpParser

Inherits:

Object

• Object
• Thin::HttpParser

Defined in:

ext/thin_parser/thin.c

Instance Method Summary

• #error? ⇒ Boolean

  Tells you whether the parser is in an error state.

• #execute(req_hash, data, start) ⇒ Integer

  Takes a Hash and a String of data, parses the String of data filling in the Hash returning an Integer to indicate how much of the data has been read.

• #finish ⇒ Object

  Finishes a parser early which could put in a “good” or bad state.

• #finished? ⇒ Boolean

  Tells you whether the parser is finished or not and in a good state.

• #new ⇒ Object constructor

  Creates a new parser.

• #nread ⇒ Integer

  Returns the amount of data processed so far during this processing cycle.

• #reset ⇒ nil

  Resets the parser to it’s initial state so that you can reuse it rather than making new ones.

Constructor Details

#new ⇒ Object

Creates a new parser.

# File 'ext/thin_parser/thin.c', line 254

VALUE HttpParser_init(VALUE self)
{
  http_parser *http = NULL;
  DATA_GET(self, http_parser, http);
  http_parser_init(http);

  return self;
}

Instance Method Details

#error? ⇒ Boolean

Tells you whether the parser is in an error state.

Returns:

• (Boolean)

# File 'ext/thin_parser/thin.c', line 352

VALUE HttpParser_has_error(VALUE self)
{
  http_parser *http = NULL;
  DATA_GET(self, http_parser, http);

  return http_parser_has_error(http) ? Qtrue : Qfalse;
}

#execute(req_hash, data, start) ⇒ Integer

Takes a Hash and a String of data, parses the String of data filling in the Hash returning an Integer to indicate how much of the data has been read. No matter what the return value, you should call HttpParser#finished? and HttpParser#error? to figure out if it’s done parsing or there was an error.

This function now throws an exception when there is a parsing error. This makes the logic for working with the parser much easier. You can still test for an error, but now you need to wrap the parser with an exception handling block.

The third argument allows for parsing a partial request and then continuing the parsing from that position. It needs all of the original data as well so you have to append to the data buffer as you read.

Returns:

• (Integer)

# File 'ext/thin_parser/thin.c', line 315

VALUE HttpParser_execute(VALUE self, VALUE req_hash, VALUE data, VALUE start)
{
  http_parser *http = NULL;
  int from = 0;
  char *dptr = NULL;
  long dlen = 0;

  DATA_GET(self, http_parser, http);

  from = FIX2INT(start);
  dptr = RSTRING_PTR(data);
  dlen = RSTRING_LEN(data);

  if(from >= dlen) {
    rb_raise(eHttpParserError, "Requested start is after data buffer end.");
  } else {
    http->data = (void *)req_hash;
    http_parser_execute(http, dptr, dlen, from);

    VALIDATE_MAX_LENGTH(http_parser_nread(http), HEADER);

    if(http_parser_has_error(http)) {
      rb_raise(eHttpParserError, "Invalid HTTP format, parsing fails.");
    } else {
      return INT2FIX(http_parser_nread(http));
    }
  }
}

#finish ⇒ Object

Finishes a parser early which could put in a “good” or bad state. You should call reset after finish it or bad things will happen.

# File 'ext/thin_parser/thin.c', line 288

VALUE HttpParser_finish(VALUE self)
{
  http_parser *http = NULL;
  DATA_GET(self, http_parser, http);
  http_parser_finish(http);

  return http_parser_is_finished(http) ? Qtrue : Qfalse;
}

#finished? ⇒ Boolean

Tells you whether the parser is finished or not and in a good state.

Returns:

• (Boolean)

# File 'ext/thin_parser/thin.c', line 367

VALUE HttpParser_is_finished(VALUE self)
{
  http_parser *http = NULL;
  DATA_GET(self, http_parser, http);

  return http_parser_is_finished(http) ? Qtrue : Qfalse;
}

#nread ⇒ Integer

Returns the amount of data processed so far during this processing cycle. It is set to 0 on initialize or reset calls and is incremented each time execute is called.

Returns:

• (Integer)

# File 'ext/thin_parser/thin.c', line 383

VALUE HttpParser_nread(VALUE self)
{
  http_parser *http = NULL;
  DATA_GET(self, http_parser, http);

  return INT2FIX(http->nread);
}

#reset ⇒ nil

Resets the parser to it’s initial state so that you can reuse it rather than making new ones.

Returns:

• (nil)

# File 'ext/thin_parser/thin.c', line 271

VALUE HttpParser_reset(VALUE self)
{
  http_parser *http = NULL;
  DATA_GET(self, http_parser, http);
  http_parser_init(http);

  return Qnil;
}