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/*
* Copyright (c) 2002-2009 Moxie Marlinspike
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include "HttpHeaders.hpp"
#include "../util/Util.hpp"
#include "../Logger.hpp"
std::map<std::string, std::string, ci_less>& HttpHeaders::getHeaders() {
return headers;
}
std::string& HttpHeaders::getHeader(std::string &header) {
return headers[header];
}
bool HttpHeaders::isPost() {
return method == std::string("POST");
}
std::string& HttpHeaders::getMethod() {
return method;
}
std::string& HttpHeaders::getRequest() {
return request;
}
std::string& HttpHeaders::getPostData() {
return postData;
}
int HttpHeaders::readLine(char *buffer, int *offset, int length) {
int i;
for (i=*offset;i<length;i++) {
if (buffer[i] == '\n') foundLf = 1;
else if (buffer[i] == '\r') {foundCr = 1; foundLf = 0;}
else {foundCr = 0; foundLf = 0;}
if (foundCr && foundLf) {
foundCr = 0;
foundLf = 0;
*offset = i;
return 1;
}
}
*offset = i;
return 0;
}
void HttpHeaders::parseAction() {
Util::trimString(action);
size_t methodEnd = action.find(" ");
size_t requestEnd = action.find_last_of(" ");
if (methodEnd == std::string::npos || requestEnd == std::string::npos)
throw HttpHeaderException();
method = action.substr(0, methodEnd);
request = action.substr(methodEnd+1, requestEnd - methodEnd);
Util::trimString(method);
Util::trimString(request);
// std::cerr << "Read Action: " << action << std::endl;
// std::cerr << "Method: " << method << std::endl;
// std::cerr << "Request: " << request << std::endl;
}
int HttpHeaders::readAction(char *buffer, int length) {
int offset = 0;
int complete = readLine(buffer, &offset, length);
action.append(buffer, offset+1);
if (complete) {
parseAction();
this->state = READING_KEY;
}
return offset + 1;
}
int HttpHeaders::readValue(char *buffer, int offset, int length) {
int eolOffset = offset;
int complete = readLine(buffer, &eolOffset, length);
this->value.append(buffer+offset, (eolOffset - offset));
if (complete) {
this->state = READING_KEY;
this->headers[key] = value;
// std::cerr << "Found value: " << this->value << std::endl;
this->key.clear();
this->value.clear();
}
return eolOffset + 1;
}
int HttpHeaders::readKey(char *buffer, int offset, int length) {
int i;
if (offset < length && buffer[offset] == '\r') {
if (isPost()) this->state = READING_POST;
else this->state = READING_DONE;
return offset + 2;
}
for (i=offset;i<length;i++) {
if (buffer[i] == ':') {
this->state = READING_VALUE;
break;
}
}
this->key.append(buffer+offset, (i-offset));
// if (this->state == READING_VALUE)
// std::cerr << "Found Key: " << this->key << " at " << i << std::endl;
return i+1;
}
int HttpHeaders::getContentLength() {
std::string contentKey = "Content-Length";
std::string contentLengthStr = getHeader(contentKey);
int contentLength;
if (!Util::fromString<int>(contentLength, contentLengthStr, std::dec)) {
Logger::logError("Could not read POST data without Content-Length...");
return 0;
}
return contentLength;
}
void HttpHeaders::readPostData(char *buffer, int offset, int length) {
int contentLength = getContentLength();
int contentLeft = contentLength - postData.length();
int dataLeft = length - offset;
int copyLength = (dataLeft < contentLeft) ? dataLeft : contentLeft;
postData.append(buffer, offset, copyLength);
if (postData.length() >= contentLength) {
state = READING_DONE;
// std::cerr << "*** Got POST data: " << postData << std::endl;
}
}
bool HttpHeaders::process(char *buffer, int length) {
int offset = 0;
while (offset < length) {
switch(state) {
case READING_ACTION: offset = readAction(buffer, length); break;
case READING_KEY: offset = readKey(buffer, offset, length); break;
case READING_VALUE: offset = readValue(buffer, offset, length); break;
case READING_POST: readPostData(buffer, offset, length); break;
case READING_DONE: return true;
}
}
if (state == READING_DONE) return true;
else return false;
}
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