-
Notifications
You must be signed in to change notification settings - Fork 9k
Expand file tree
/
Copy pathStaticRequestHandler.cpp
More file actions
137 lines (109 loc) · 5.52 KB
/
Copy pathStaticRequestHandler.cpp
File metadata and controls
137 lines (109 loc) · 5.52 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
#include <Server/StaticRequestHandler.h>
#include <Server/IServer.h>
#include <Server/HTTP/HTTPResponseHelpers.h>
#include <Server/HTTPHandlerFactory.h>
#include <Server/HTTPResponseHeaderWriter.h>
#include <Core/ServerSettings.h>
#include <IO/HTTPCommon.h>
#include <IO/ReadBufferFromFile.h>
#include <IO/WriteBufferFromString.h>
#include <IO/WriteHelpers.h>
#include <IO/copyData.h>
#include <Interpreters/Context.h>
#include <Server/HTTP/WriteBufferFromHTTPServerResponse.h>
#include <Common/Exception.h>
#include <memory>
#include <unordered_map>
#include <Poco/Net/HTTPServerRequest.h>
#include <Poco/Net/HTTPServerResponse.h>
#include <Poco/Util/LayeredConfiguration.h>
#include <filesystem>
namespace fs = std::filesystem;
namespace DB
{
namespace ErrorCodes
{
extern const int INCORRECT_FILE_NAME;
extern const int HTTP_LENGTH_REQUIRED;
extern const int INVALID_CONFIG_PARAMETER;
}
void StaticRequestHandler::handleRequest(HTTPServerRequest & request, HTTPServerResponse & response, const ProfileEvents::Event & /*write_event*/)
{
applyHTTPResponseHeaders(response, http_response_headers_override);
if (request.getVersion() == Poco::Net::HTTPServerRequest::HTTP_1_1)
response.setChunkedTransferEncoding(true);
auto response_output = responseWriteBuffer(request, response);
try
{
/// Workaround. Poco does not detect 411 Length Required case.
if (request.getMethod() == Poco::Net::HTTPRequest::HTTP_POST && !request.getChunkedTransferEncoding() && !request.hasContentLength())
throw Exception(ErrorCodes::HTTP_LENGTH_REQUIRED,
"The Transfer-Encoding is not chunked and there "
"is no Content-Length header for POST request");
setResponseDefaultHeaders(response);
response.setStatusAndReason(Poco::Net::HTTPResponse::HTTPStatus(status));
writeResponse(*response_output.get());
response_output.get()->finalize();
}
catch (...)
{
tryLogCurrentException("StaticRequestHandler");
/// If we are about to send an uncompressed exception body (no compression layer was set up,
/// e.g. the response was pre-encoded via configured `Content-Encoding`), that header would
/// mislabel the plain-text error and the client would fail to decode it. Drop it while the
/// response has not been sent yet.
if (!response_output.compression_holder && !response.sent() && response.has("Content-Encoding"))
response.erase("Content-Encoding");
response_output.response_holder->cancelWithException(
request, getCurrentExceptionCode(), getCurrentExceptionMessage(false, true), response_output.compression_holder.get());
}
}
void StaticRequestHandler::writeResponse(WriteBuffer & out)
{
static const String file_prefix = "file://";
static const String config_prefix = "config://";
if (startsWith(response_expression, file_prefix))
{
auto file_name = response_expression.substr(file_prefix.size(), response_expression.size() - file_prefix.size());
if (file_name.starts_with('/'))
file_name = file_name.substr(1);
fs::path user_files_absolute_path = fs::canonical(fs::path(server.context()->getUserFilesPath()));
String file_path = fs::weakly_canonical(user_files_absolute_path / file_name);
if (!fs::exists(file_path))
throw Exception(ErrorCodes::INCORRECT_FILE_NAME, "Invalid file name {} for static HTTPHandler. ", file_path);
ReadBufferFromFile in(file_path);
copyData(in, out);
}
else if (startsWith(response_expression, config_prefix))
{
if (response_expression.size() <= config_prefix.size())
throw Exception(ErrorCodes::INVALID_CONFIG_PARAMETER,
"Static handling rule handler must contain a complete configuration path, for example: "
"config://config_key");
const auto & config_path = response_expression.substr(config_prefix.size(), response_expression.size() - config_prefix.size());
writeString(server.config().getRawString(config_path, "Ok.\n"), out);
}
else
writeString(response_expression, out);
}
StaticRequestHandler::StaticRequestHandler(
IServer & server_, const String & expression, const std::unordered_map<String, String> & http_response_headers_override_, int status_)
: server(server_), status(status_), http_response_headers_override(http_response_headers_override_), response_expression(expression)
{
}
HTTPRequestHandlerFactoryPtr createStaticHandlerFactory(IServer & server,
const Poco::Util::AbstractConfiguration & config,
const std::string & config_prefix,
std::unordered_map<String, String> & common_headers)
{
int status = config.getInt(config_prefix + ".handler.status", 200);
std::string response_content = config.getRawString(config_prefix + ".handler.response_content", "Ok.\n");
std::unordered_map<String, String> http_response_headers_override
= parseHTTPResponseHeadersWithCommons(config, config_prefix, "text/plain; charset=UTF-8", common_headers);
auto creator = [&server, http_response_headers_override, response_content, status]() -> std::unique_ptr<StaticRequestHandler>
{ return std::make_unique<StaticRequestHandler>(server, response_content, http_response_headers_override, status); };
auto factory = std::make_shared<HandlingRuleHTTPHandlerFactory<StaticRequestHandler>>(std::move(creator));
factory->addFiltersFromConfig(config, config_prefix);
return factory;
}
}