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/*
* Authored by Alex Hultman, 2018-2020.
* Intellectual property of third-party.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* Implements the common parser (RFC 822) used in both HTTP and Multipart parsing */
#ifndef UWS_MESSAGE_PARSER_H
#define UWS_MESSAGE_PARSER_H
#include <string_view>
#include <utility>
#include <cstring>
/* For now we have this one here */
#define MAX_HEADERS 10
namespace uWS {
// should be templated on whether it needs at lest one header (http), or not (multipart)
static inline unsigned int getHeaders(char *postPaddedBuffer, char *end, std::pair<std::string_view, std::string_view> *headers) {
char *preliminaryKey, *preliminaryValue, *start = postPaddedBuffer;
for (unsigned int i = 0; i < MAX_HEADERS; i++) {
for (preliminaryKey = postPaddedBuffer; (*postPaddedBuffer != ':') & (*(unsigned char *)postPaddedBuffer > 32); *(postPaddedBuffer++) |= 32);
if (*postPaddedBuffer == '\r') {
if ((postPaddedBuffer != end) & (postPaddedBuffer[1] == '\n') /* & (i > 0) */) { // multipart does not require any headers like http does
headers->first = std::string_view(nullptr, 0);
return (unsigned int) ((postPaddedBuffer + 2) - start);
} else {
return 0;
}
} else {
headers->first = std::string_view(preliminaryKey, (size_t) (postPaddedBuffer - preliminaryKey));
for (postPaddedBuffer++; (*postPaddedBuffer == ':' || *(unsigned char *)postPaddedBuffer < 33) && *postPaddedBuffer != '\r'; postPaddedBuffer++);
preliminaryValue = postPaddedBuffer;
postPaddedBuffer = (char *) memchr(postPaddedBuffer, '\r', end - postPaddedBuffer);
if (postPaddedBuffer && postPaddedBuffer[1] == '\n') {
headers->second = std::string_view(preliminaryValue, (size_t) (postPaddedBuffer - preliminaryValue));
postPaddedBuffer += 2;
headers++;
} else {
return 0;
}
}
}
return 0;
}
}
#endif
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