Method _parse_headers

gunicorn/asgi/parser.py:527–569

Parse headers, return True if headers are complete.

(self)

        return True

    def _parse_headers(self):
        class="st">""class="st">"Parse headers, return True if headers are complete."class="st">""
        while True:
            idx = self._buffer.find(b&class="cm">#x27;\r\n')
            if idx == -1:
                return False

            line = bytes(self._buffer[:idx])
            del self._buffer[:idx + 2]

            if not line:
                class="cm"># Empty line = end of headers
                self._finalize_headers()
                return True

            class="cm"># Check header field size limit (include CRLF in size to match WSGI parser)
            if self._limit_request_field_size > 0 and len(line) + 2 > self._limit_request_field_size:
                raise LimitRequestHeaders(class="st">"Request header field is too large")

            class="cm"># Check header count limit
            self._header_count += 1
            if self._limit_request_fields > 0 and self._header_count > self._limit_request_fields:
                raise LimitRequestHeaders(class="st">"Too many headers")

            class="cm"># Parse header
            colon = line.find(b&class="cm">#x27;:')
            if colon == -1:
                raise InvalidHeader(class="st">"Missing colon in header")

            name = line[:colon].strip()
            if not self._is_valid_token(name):
                raise InvalidHeaderName(name.decode(&class="cm">#x27;latin-1'))

            value = line[colon + 1:].strip()
            if self._has_invalid_header_chars(value):
                raise InvalidHeader(class="st">"Invalid characters in header value")

            class="cm"># Store lowercase name for internal use
            name_lower = name.lower()
            self._headers_list.append((name_lower, value))

            if self._on_header:
                self._on_header(name_lower, value)

    def _finalize_headers(self):
        class="st">"""Called when all headers received.