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HTTPHeaders.cpp
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HTTPHeaders.cpp
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#include "Common/Net/HTTPHeaders.h"
#include <algorithm>
#include <stdio.h>
#include <stdlib.h>
#include "Common/Net/Sinks.h"
#include "Common/Log.h"
#include "Common/File/FileDescriptor.h"
#include "Common/StringUtils.h"
namespace http {
RequestHeader::RequestHeader() {
}
RequestHeader::~RequestHeader() {
delete [] referer;
delete [] user_agent;
delete [] resource;
delete [] params;
}
bool RequestHeader::GetParamValue(const char *param_name, std::string *value) const {
if (!params)
return false;
std::string p(params);
std::vector<std::string_view> v;
SplitString(p, '&', v);
for (size_t i = 0; i < v.size(); i++) {
std::vector<std::string_view> parts;
SplitString(v[i], '=', parts);
DEBUG_LOG(IO, "Param: %.*s Value: %.*s", parts[0].size(), parts[0].data(), parts[1].size(), parts[1].data());
if (parts[0] == param_name) {
*value = parts[1];
return true;
}
}
return false;
}
bool RequestHeader::GetOther(const char *name, std::string *value) const {
auto it = other.find(name);
if (it != other.end()) {
*value = it->second;
return true;
}
return false;
}
// Intended to be a mad fast parser. It's not THAT fast currently, there's still
// things to optimize, but meh.
int RequestHeader::ParseHttpHeader(const char *buffer) {
if (first_header_) {
// Step 1: Method
first_header_ = false;
if (!memcmp(buffer, "GET ", 4)) {
method = GET;
buffer += 4;
} else if (!memcmp(buffer, "HEAD ", 5)) {
method = HEAD;
buffer += 5;
} else if (!memcmp(buffer, "POST ", 5)) {
method = POST;
buffer += 5;
} else {
method = UNSUPPORTED;
status = 405;
return -1;
}
SkipSpace(&buffer);
// Step 2: Resource, params (what's after the ?, if any)
const char *endptr = strchr(buffer, ' ');
const char *q_ptr = strchr(buffer, '?');
int resource_name_len;
if (q_ptr)
resource_name_len = q_ptr - buffer;
else
resource_name_len = endptr - buffer;
if (!resource_name_len) {
status = 400;
return -1;
}
resource = new char[resource_name_len + 1];
memcpy(resource, buffer, resource_name_len);
resource[resource_name_len] = '\0';
if (q_ptr) {
int param_length = endptr - q_ptr - 1;
params = new char[param_length + 1];
memcpy(params, q_ptr + 1, param_length);
params[param_length] = '\0';
}
if (strstr(buffer, "HTTP/"))
type = FULL;
else
type = SIMPLE;
return 0;
}
// We have a real header to parse.
const char *colon = strchr(buffer, ':');
if (!colon) {
status = 400;
return -1;
}
// The header is formatted as key: value.
int key_len = colon - buffer;
const char *key = buffer;
// Go to after the colon to get the value.
buffer = colon + 1;
SkipSpace(&buffer);
int value_len = (int)strlen(buffer);
if (!strncasecmp(key, "User-Agent", key_len)) {
user_agent = new char[value_len + 1];
memcpy(user_agent, buffer, value_len + 1);
VERBOSE_LOG(IO, "user-agent: %s", user_agent);
} else if (!strncasecmp(key, "Referer", key_len)) {
referer = new char[value_len + 1];
memcpy(referer, buffer, value_len + 1);
} else if (!strncasecmp(key, "Content-Length", key_len)) {
content_length = atoi(buffer);
VERBOSE_LOG(IO, "Content-Length: %i", (int)content_length);
} else {
std::string key_str(key, key_len);
std::transform(key_str.begin(), key_str.end(), key_str.begin(), tolower);
other[key_str] = buffer;
}
return 0;
}
void RequestHeader::ParseHeaders(net::InputSink *sink) {
int line_count = 0;
std::string line;
while (sink->ReadLine(line)) {
if (line.length() == 0) {
// Blank line, this means end of headers.
break;
}
ParseHttpHeader(line.c_str());
line_count++;
if (type == SIMPLE) {
// Done!
VERBOSE_LOG(IO, "Simple: Done parsing http request.");
break;
}
}
VERBOSE_LOG(IO, "finished parsing request.");
ok = line_count > 1 && resource != nullptr;
}
} // namespace http