| 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 | #include "llvm/Support/raw_ostream.h" |
| 11 | |
| 12 | #include <string> |
| 13 | |
| 14 | #include <cstdint> |
| 15 | #include <optional> |
| 16 | #include <tuple> |
| 17 | |
| 18 | using namespace lldb_private; |
| 19 | |
| 20 | llvm::raw_ostream &lldb_private::operator<<(llvm::raw_ostream &OS, |
| 21 | const URI &U) { |
| 22 | OS << U.scheme << "://["<< U.hostname << ']'; |
| 23 | if (U.port) |
| 24 | OS << ':' << *U.port; |
| 25 | return OS << U.path; |
| 26 | } |
| 27 | |
| 28 | std::optional<URI> URI::Parse(llvm::StringRef uri) { |
| 29 | URI ret; |
| 30 | |
| 31 | const llvm::StringRef kSchemeSep("://"); |
| 32 | auto pos = uri.find(Str: kSchemeSep); |
| 33 | if (pos == std::string::npos) |
| 34 | return std::nullopt; |
| 35 | |
| 36 | // Extract path. |
| 37 | ret.scheme = uri.substr(Start: 0, N: pos); |
| 38 | auto host_pos = pos + kSchemeSep.size(); |
| 39 | auto path_pos = uri.find(C: '/', From: host_pos); |
| 40 | if (path_pos != std::string::npos) |
| 41 | ret.path = uri.substr(Start: path_pos); |
| 42 | else |
| 43 | ret.path = "/"; |
| 44 | |
| 45 | auto host_port = uri.substr( |
| 46 | Start: host_pos, |
| 47 | N: ((path_pos != std::string::npos) ? path_pos : uri.size()) - host_pos); |
| 48 | |
| 49 | // Extract hostname |
| 50 | if (host_port.starts_with(Prefix: '[')) { |
| 51 | // hostname is enclosed with square brackets. |
| 52 | pos = host_port.rfind(C: ']'); |
| 53 | if (pos == std::string::npos) |
| 54 | return std::nullopt; |
| 55 | |
| 56 | ret.hostname = host_port.substr(Start: 1, N: pos - 1); |
| 57 | host_port = host_port.drop_front(N: pos + 1); |
| 58 | if (!host_port.empty() && !host_port.consume_front(Prefix: ":")) |
| 59 | return std::nullopt; |
| 60 | } else { |
| 61 | std::tie(args&: ret.hostname, args&: host_port) = host_port.split(Separator: ':'); |
| 62 | } |
| 63 | |
| 64 | // Extract port |
| 65 | if (!host_port.empty()) { |
| 66 | uint16_t port_value = 0; |
| 67 | if (host_port.getAsInteger(Radix: 0, Result&: port_value)) |
| 68 | return std::nullopt; |
| 69 | ret.port = port_value; |
| 70 | } else |
| 71 | ret.port = std::nullopt; |
| 72 | |
| 73 | return ret; |
| 74 | } |
| 75 |