forked from facebook/proxygen
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathFilters.h
More file actions
125 lines (100 loc) · 3.15 KB
/
Filters.h
File metadata and controls
125 lines (100 loc) · 3.15 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
/*
* Copyright (c) 2015, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
*/
#pragma once
#include <proxygen/httpserver/RequestHandler.h>
#include <proxygen/httpserver/ResponseHandler.h>
namespace proxygen {
/**
* Filters are a way to add functionality to HTTPServer without complicating app
* specific RequestHandler. The basic idea is
*
* App-handler <=> Filter-1 <=> Filter-2 <=> Client
*
* The data flows through these filters between client and handler. They can do
* things like modify the data flowing through them, can update stats, create
* traces and even send direct response if they feel like.
*
* The default implementation just lets everything pass through.
*/
class Filter : public RequestHandler, public ResponseHandler {
public:
explicit Filter(RequestHandler* upstream)
: ResponseHandler(upstream) {
}
// Request handler
void setResponseHandler(ResponseHandler* handler) noexcept override {
// Save downstream handler and pass ourselves as downstream handler
downstream_ = handler;
upstream_->setResponseHandler(this);
}
void onRequest(std::unique_ptr<HTTPMessage> headers) noexcept override {
upstream_->onRequest(std::move(headers));
}
void onBody(std::unique_ptr<folly::IOBuf> body) noexcept override {
upstream_->onBody(std::move(body));
}
void onUpgrade(UpgradeProtocol protocol) noexcept override {
upstream_->onUpgrade(protocol);
}
void onEOM() noexcept override {
upstream_->onEOM();
}
void requestComplete() noexcept override {
downstream_ = nullptr;
upstream_->requestComplete();
delete this;
}
void onError(ProxygenError err) noexcept override {
downstream_ = nullptr;
upstream_->onError(err);
delete this;
}
void onEgressPaused() noexcept {
upstream_->onEgressPaused();
}
void onEgressResumed() noexcept {
upstream_->onEgressResumed();
}
// Response handler
void sendHeaders(HTTPMessage& msg) noexcept override {
downstream_->sendHeaders(msg);
}
void sendChunkHeader(size_t len) noexcept override {
downstream_->sendChunkHeader(len);
}
void sendBody(std::unique_ptr<folly::IOBuf> body) noexcept override {
downstream_->sendBody(std::move(body));
}
void sendChunkTerminator() noexcept override {
downstream_->sendChunkTerminator();
}
void sendEOM() noexcept override {
downstream_->sendEOM();
}
void sendAbort() noexcept override {
downstream_->sendAbort();
}
void refreshTimeout() noexcept override {
downstream_->refreshTimeout();
}
void pauseIngress() noexcept override {
downstream_->pauseIngress();
}
void resumeIngress() noexcept override {
downstream_->resumeIngress();
}
const folly::TransportInfo& getSetupTransportInfo() const noexcept override {
return downstream_->getSetupTransportInfo();
}
void getCurrentTransportInfo(folly::TransportInfo* tinfo) const override {
downstream_->getCurrentTransportInfo(tinfo);
}
};
}