1 //===-- UriParser.cpp -----------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "lldb/Utility/UriParser.h"
10 
11 #include <string>
12 
13 #include <cstdint>
14 #include <tuple>
15 
16 using namespace lldb_private;
17 
18 // UriParser::Parse
19 bool UriParser::Parse(llvm::StringRef uri, llvm::StringRef &scheme,
20                       llvm::StringRef &hostname, int &port,
21                       llvm::StringRef &path) {
22   llvm::StringRef tmp_scheme, tmp_hostname, tmp_path;
23 
24   const llvm::StringRef kSchemeSep("://");
25   auto pos = uri.find(kSchemeSep);
26   if (pos == std::string::npos)
27     return false;
28 
29   // Extract path.
30   tmp_scheme = uri.substr(0, pos);
31   auto host_pos = pos + kSchemeSep.size();
32   auto path_pos = uri.find('/', host_pos);
33   if (path_pos != std::string::npos)
34     tmp_path = uri.substr(path_pos);
35   else
36     tmp_path = "/";
37 
38   auto host_port = uri.substr(
39       host_pos,
40       ((path_pos != std::string::npos) ? path_pos : uri.size()) - host_pos);
41 
42   // Extract hostname
43   if (!host_port.empty() && host_port[0] == '[') {
44     // hostname is enclosed with square brackets.
45     pos = host_port.rfind(']');
46     if (pos == std::string::npos)
47       return false;
48 
49     tmp_hostname = host_port.substr(1, pos - 1);
50     host_port = host_port.drop_front(pos + 1);
51     if (!host_port.empty() && !host_port.consume_front(":"))
52       return false;
53   } else {
54     std::tie(tmp_hostname, host_port) = host_port.split(':');
55   }
56 
57   // Extract port
58   if (!host_port.empty()) {
59     uint16_t port_value = 0;
60     if (host_port.getAsInteger(0, port_value))
61       return false;
62     port = port_value;
63   } else
64     port = -1;
65 
66   scheme = tmp_scheme;
67   hostname = tmp_hostname;
68   path = tmp_path;
69   return true;
70 }
71