82 lines
2.6 KiB
C++
82 lines
2.6 KiB
C++
// Copyright 2013 Google Inc. All Rights Reserved.
|
|
|
|
#include "license_request.h"
|
|
#include "log.h"
|
|
|
|
namespace wvcdm {
|
|
|
|
static const std::string kTwoBlankLines("\r\n\r\n");
|
|
|
|
size_t LicenseRequest::FindHeaderEndPosition(
|
|
const std::string& response) const {
|
|
return(response.find(kTwoBlankLines));
|
|
}
|
|
|
|
// This routine parses the license server's response message and
|
|
// extracts the drm message from the response header.
|
|
void LicenseRequest::GetDrmMessage(const std::string& response,
|
|
std::string& drm_msg) {
|
|
if (response.empty()) {
|
|
drm_msg.clear();
|
|
return;
|
|
}
|
|
|
|
// Extracts DRM message.
|
|
// Content-Length = GLS line + Header(s) + empty line + drm message;
|
|
// we use the empty line to locate the drm message, and compute
|
|
// the drm message length as below instead of using Content-Length
|
|
size_t header_end_pos = FindHeaderEndPosition(response);
|
|
if (header_end_pos != std::string::npos) {
|
|
header_end_pos += kTwoBlankLines.size(); // points to response body
|
|
|
|
drm_msg.clear();
|
|
size_t drm_msg_pos = response.find(kTwoBlankLines, header_end_pos);
|
|
if (drm_msg_pos != std::string::npos) {
|
|
drm_msg_pos += kTwoBlankLines.size(); // points to drm message
|
|
} else {
|
|
// For backward compatibility, no blank line after error code
|
|
drm_msg_pos = response.find("\r\n", header_end_pos);
|
|
if (drm_msg_pos != std::string::npos) {
|
|
drm_msg_pos += 2; // points to drm message
|
|
}
|
|
}
|
|
|
|
if (drm_msg_pos != std::string::npos) {
|
|
drm_msg = response.substr(drm_msg_pos);
|
|
} else {
|
|
drm_msg = response.substr(header_end_pos);
|
|
}
|
|
} else {
|
|
LOGE("response body not found");
|
|
}
|
|
}
|
|
|
|
// Returns heartbeat url in heartbeat_url.
|
|
// The heartbeat url is stored as meta data in the response message.
|
|
void LicenseRequest::GetHeartbeatUrl(const std::string& response,
|
|
std::string& heartbeat_url) {
|
|
if (response.empty()) {
|
|
heartbeat_url.clear();
|
|
return;
|
|
}
|
|
|
|
size_t header_end_pos = FindHeaderEndPosition(response);
|
|
if (header_end_pos != std::string::npos) {
|
|
header_end_pos += kTwoBlankLines.size(); // points to response body
|
|
|
|
heartbeat_url.clear();
|
|
size_t heartbeat_url_pos = response.find("Heartbeat-Url: ",
|
|
header_end_pos);
|
|
if (heartbeat_url_pos != std::string::npos) {
|
|
heartbeat_url_pos += sizeof("Heartbeat-Url: ");
|
|
heartbeat_url.assign(response.substr(heartbeat_url_pos));
|
|
} else {
|
|
LOGE("heartbeat url not found");
|
|
}
|
|
} else {
|
|
LOGE("response body not found");
|
|
}
|
|
}
|
|
|
|
} // namespace wvcdm
|