+bool parseFirstLine(int const client, std::string const &request, std::string &filename, bool &sendContent) { /*{{{*/
+ if (strncmp(request.c_str(), "HEAD ", 5) == 0)
+ sendContent = false;
+ if (strncmp(request.c_str(), "GET ", 4) != 0)
+ {
+ sendError(client, 501, request, true);
+ return false;
+ }
+
+ size_t const lineend = request.find('\n');
+ size_t filestart = request.find(' ');
+ for (; request[filestart] == ' '; ++filestart);
+ size_t fileend = request.rfind(' ', lineend);
+ if (lineend == std::string::npos || filestart == std::string::npos ||
+ fileend == std::string::npos || filestart == fileend) {
+ sendError(client, 500, request, sendContent, "Filename can't be extracted");
+ return false;
+ }
+
+ size_t httpstart = fileend;
+ for (; request[httpstart] == ' '; ++httpstart);
+ if (strncmp(request.c_str() + httpstart, "HTTP/1.1\r", 9) != 0) {
+ sendError(client, 500, request, sendContent, "Not an HTTP/1.1 request");
+ return false;
+ }
+
+ filename = request.substr(filestart, fileend - filestart);
+ if (filename.find(' ') != std::string::npos) {
+ sendError(client, 500, request, sendContent, "Filename contains an unencoded space");
+ return false;
+ }
+ filename = DeQuoteString(filename);
+
+ // this is not a secure server, but at least prevent the obvious …
+ if (filename.empty() == true || filename[0] != '/' ||
+ strncmp(filename.c_str(), "//", 2) == 0 ||
+ filename.find_first_of("\r\n\t\f\v") != std::string::npos ||
+ filename.find("/../") != std::string::npos) {
+ sendError(client, 400, request, sendContent, "Filename contains illegal character (sequence)");
+ return false;
+ }
+
+ // nuke the first character which is a / as we assured above
+ filename.erase(0, 1);
+ if (filename.empty() == true)
+ filename = ".";
+ return true;
+}
+ /*}}}*/