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#pragma once
#include <sstream>
#include <string>
#include "utility.hpp"
#ifndef YAHTTP_MAX_URL_LENGTH
#define YAHTTP_MAX_URL_LENGTH 2048
#endif
namespace YaHTTP {
/*! URL parser and container */
class URL {
private:
bool parseSchema(const std::string& url, size_t &pos) {
size_t pos1;
if (pos >= url.size()) return false; // no data
if ( (pos1 = url.find_first_of(":",pos)) == std::string::npos ) return false; // schema is mandatory
protocol = url.substr(pos, pos1-pos);
if (protocol == "http") port = 80;
if (protocol == "https") port = 443;
pos = pos1+1; // after :
if (url.compare(pos, 2, "//") == 0) {
pathless = false; // if this is true we put rest into parameters
pos += 2;
}
return true;
}; //<! parse schema/protocol part
bool parseHost(const std::string& url, size_t &pos) {
size_t pos1;
if (pos >= url.size()) return true; // no data
if ( (pos1 = url.find_first_of("/", pos)) == std::string::npos ) {
host = url.substr(pos);
path = "/";
pos = url.size();
} else {
host = url.substr(pos, pos1-pos);
pos = pos1;
}
if (host.at(0) == '[') { // IPv6
if ((pos1 = host.find_first_of("]")) == std::string::npos) {
// incomplete address
return false;
}
size_t pos2;
if ((pos2 = host.find_first_of(":", pos1)) != std::string::npos) {
std::istringstream tmp(host.substr(pos2 + 1));
tmp >> port;
}
host = host.substr(1, pos1 - 1);
} else if ( (pos1 = host.find_first_of(":")) != std::string::npos ) {
std::istringstream tmp(host.substr(pos1+1));
tmp >> port;
host = host.substr(0, pos1);
}
return true;
}; //<! parse host and port
bool parseUserPass(const std::string& url, size_t &pos) {
size_t pos1,pos2;
if (pos >= url.size()) return true; // no data
if ( (pos1 = url.find_first_of("@",pos)) == std::string::npos ) return true; // no userinfo
pos2 = url.find_first_of(":",pos);
if (pos2 != std::string::npos) { // comes with password
username = url.substr(pos, pos2 - pos);
password = url.substr(pos2+1, pos1 - pos2 - 1);
password = Utility::decodeURL(password);
} else {
username = url.substr(pos, pos1 - pos);
}
pos = pos1+1;
username = Utility::decodeURL(username);
return true;
}; //<! parse possible username and password
bool parsePath(const std::string& url, size_t &pos) {
size_t pos1;
if (pos >= url.size()) return true; // no data
if (url[pos] != '/') return false; // not an url
if ( (pos1 = url.find_first_of("?", pos)) == std::string::npos ) {
path = url.substr(pos);
pos = url.size();
} else {
path = url.substr(pos, pos1-pos);
pos = pos1;
}
return true;
}; //<! parse path component
bool parseParameters(const std::string& url, size_t &pos) {
size_t pos1;
if (pos >= url.size()) return true; // no data
if (url[pos] == '#') return true; // anchor starts here
if (url[pos] != '?') return false; // not a parameter
if ( (pos1 = url.find_first_of("#", pos)) == std::string::npos ) {
parameters = url.substr(pos+1);;
pos = url.size();
} else {
parameters = url.substr(pos+1, pos1-pos-1);
pos = pos1;
}
if (parameters.size()>0 && *(parameters.end()-1) == '&') parameters.resize(parameters.size()-1);
return true;
}; //<! parse url parameters
bool parseAnchor(const std::string& url, size_t &pos) {
if (pos >= url.size()) return true; // no data
if (url[pos] != '#') return false; // not anchor
anchor = url.substr(pos+1);
return true;
}; //<! parse anchor
void initialize() {
protocol = ""; host = ""; port = 0; username = ""; password = ""; path = ""; parameters = ""; anchor =""; pathless = true;
}; //<! initialize to empty URL
public:
std::string to_string() const {
std::string tmp;
std::ostringstream oss;
if (protocol.empty() == false) {
oss << protocol << ":";
if (host.empty() == false) {
oss << "//";
}
}
if (username.empty() == false) {
if (password.empty() == false)
oss << Utility::encodeURL(username) << ":" << Utility::encodeURL(password) << "@";
else
oss << Utility::encodeURL(username) << "@";
}
if (host.empty() == false)
oss << host;
if (!(protocol == "http" && port == 80) &&
!(protocol == "https" && port == 443) &&
port > 0)
oss << ":" << port;
oss << path;
if (parameters.empty() == false) {
if (!pathless)
oss << "?";
oss << parameters;
}
if (anchor.empty() == false)
oss << "#" << anchor;
return oss.str();
}; //<! convert this URL to string
std::string protocol; //<! schema/protocol
std::string host; //<! host
int port; //<! port
std::string username; //<! username
std::string password; //<! password
std::string path; //<! path
std::string parameters; //<! url parameters
std::string anchor; //<! anchor
bool pathless; //<! whether this url has no path
URL() { initialize(); }; //<! construct empty url
URL(const std::string& url) {
parse(url);
}; //<! calls parse with url
URL(const char *url) {
parse(std::string(url));
}; //<! calls parse with url
bool parse(const std::string& url) {
// setup
initialize();
if (url.size() > YAHTTP_MAX_URL_LENGTH) return false;
size_t pos = 0;
if (*(url.begin()) != '/') { // full url?
if (parseSchema(url, pos) == false) return false;
if (pathless) {
parameters = url.substr(pos);
return true;
}
if (parseUserPass(url, pos) == false) return false;
if (parseHost(url, pos) == false) return false;
}
if (parsePath(url, pos) == false) return false;
if (parseParameters(url, pos) == false) return false;
return parseAnchor(url, pos);
}; //<! parse various formats of urls ranging from http://example.com/foo?bar=baz into data:base64:d089swt64wt...
friend std::ostream & operator<<(std::ostream& os, const URL& url) {
os<<url.to_string();
return os;
};
};
};
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