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#include <stddef.h>
#include <string>
#include "httpinput.h"
#include "input.h"
#include "state.pb.h"
#include "udpinput.h"
using namespace std;
namespace {
// Does not support passwords, only user:host, since this is really only used
// to parse VLC's udp://source@multicastgroup:1234/ syntax (we do not support
// even basic auth).
void split_user_host(const string &user_host, string *user, string *host)
{
size_t split = user_host.find("@");
if (split == string::npos) {
user->clear();
*host = user_host;
} else {
*user = string(user_host.begin(), user_host.begin() + split);
*host = string(user_host.begin() + split + 1, user_host.end());
}
}
} // namespace
// Extremely rudimentary URL parsing.
bool parse_url(const string &url, string *protocol, string *user, string *host, string *port, string *path)
{
// pipe:foo (or pipe:"foo").
if (url.find("pipe:") == 0) {
*protocol = "pipe";
*path = string(url.begin() + 5, url.end());
return true;
}
size_t split = url.find("://");
if (split == string::npos) {
return false;
}
*protocol = string(url.begin(), url.begin() + split);
string rest = string(url.begin() + split + 3, url.end());
// Split at the first slash, or the first colon that's not within [].
bool within_brackets = false;
for (split = 0; split < rest.size(); ++split) {
if (rest[split] == '[') {
if (within_brackets) {
// Can't nest brackets.
return false;
}
within_brackets = true;
} else if (rest[split] == ']') {
if (!within_brackets) {
// ] without matching [.
return false;
}
within_brackets = false;
} else if (rest[split] == '/') {
break;
} else if (rest[split] == ':' && !within_brackets) {
break;
}
}
if (split == rest.size()) {
// http://foo
split_user_host(rest, user, host);
*port = *protocol;
*path = "/";
return true;
}
split_user_host(string(rest.begin(), rest.begin() + split), user, host);
char ch = rest[split]; // Colon or slash.
rest = string(rest.begin() + split + 1, rest.end());
if (ch == ':') {
// Parse the port.
split = rest.find_first_of('/');
if (split == string::npos) {
// http://foo:1234
*port = rest;
*path = "/";
return true;
} else {
// http://foo:1234/bar
*port = string(rest.begin(), rest.begin() + split);
*path = string(rest.begin() + split, rest.end());
return true;
}
}
// http://foo/bar
*port = *protocol;
*path = "/" + rest;
return true;
}
Input *create_input(const string &url, Input::Encoding encoding)
{
string protocol, user, host, port, path;
if (!parse_url(url, &protocol, &user, &host, &port, &path)) {
return nullptr;
}
if (protocol == "http" || protocol == "pipe") {
return new HTTPInput(url, encoding);
}
if (protocol == "udp") {
assert(encoding == Input::INPUT_ENCODING_RAW);
return new UDPInput(url);
}
return nullptr;
}
Input *create_input(const InputProto &serialized)
{
string protocol, user, host, port, path;
if (!parse_url(serialized.url(), &protocol, &user, &host, &port, &path)) {
return nullptr;
}
if (protocol == "http" || protocol == "pipe") {
return new HTTPInput(serialized);
}
if (protocol == "udp") {
return new UDPInput(serialized);
}
return nullptr;
}
Input::~Input() {}
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