aboutsummaryrefslogtreecommitdiffstats
path: root/library/cpp/neh/http_common.h
blob: 91b4ca135626012711b0208f124ef68f066660f3 (plain) (blame)
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
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
#pragma once

#include <util/generic/array_ref.h>
#include <util/generic/flags.h>
#include <util/generic/ptr.h>
#include <util/generic/vector.h>
#include <util/stream/mem.h>
#include <util/stream/output.h>
#include <library/cpp/deprecated/atomic/atomic.h>

#include "location.h"
#include "neh.h"
#include "rpc.h"

#include <atomic>

//common primitives for http/http2

namespace NNeh {
    struct THttpErrorDetails {
        TString Details = {};
        TString Headers = {};
    };

    class IHttpRequest: public IRequest {
    public:
        using IRequest::SendReply;
        virtual void SendReply(TData& data, const TString& headers, int httpCode = 200) = 0;
        virtual const THttpHeaders& Headers() const = 0;
        virtual TStringBuf Method() const = 0;
        virtual TStringBuf Body() const = 0;
        virtual TStringBuf Cgi() const = 0;
        void SendError(TResponseError err, const TString& details = TString()) override final {
            SendError(err, THttpErrorDetails{.Details = details});
        }

        virtual void SendError(TResponseError err, const THttpErrorDetails& details) = 0;
    };

    namespace NHttp {
        enum class EResolverType {
            ETCP = 0,
            EUNIXSOCKET = 1
        };

        struct TFdLimits {
        public:
            TFdLimits()
                : Soft_(10000)
                , Hard_(15000)
            {
            }

            TFdLimits(const TFdLimits& other)  {
                Soft_.store(other.Soft(), std::memory_order_release);
                Hard_.store(other.Hard(), std::memory_order_release);
            }

            inline size_t Delta() const noexcept {
                return ExceedLimit(Hard_.load(std::memory_order_acquire), Soft_.load(std::memory_order_acquire));
            }

            inline static size_t ExceedLimit(size_t val, size_t limit) noexcept {
                return val > limit ? val - limit : 0;
            }

            void SetSoft(size_t value) noexcept {
                Soft_.store(value, std::memory_order_release);
            }

            void SetHard(size_t value) noexcept {
                Hard_.store(value, std::memory_order_release);
            }

            size_t Soft() const noexcept {
                return Soft_.load(std::memory_order_acquire);
            }

            size_t Hard() const noexcept {
                return Hard_.load(std::memory_order_acquire);
            }

        private:
            std::atomic<size_t> Soft_;
            std::atomic<size_t> Hard_;
        };

        template <class T>
        class TLockFreeSequence {
        public:
            inline TLockFreeSequence() {
                memset((void*)T_, 0, sizeof(T_));
            }

            inline ~TLockFreeSequence() {
                for (size_t i = 0; i < Y_ARRAY_SIZE(T_); ++i) {
                    delete[] T_[i];
                }
            }

            inline T& Get(size_t n) {
                const size_t i = GetValueBitCount(n + 1) - 1;

                return GetList(i)[n + 1 - (((size_t)1) << i)];
            }

        private:
            inline T* GetList(size_t n) {
                T* volatile* t = T_ + n;

                T* result;
                while (!(result = AtomicGet(*t))) {
                    TArrayHolder<T> nt(new T[((size_t)1) << n]);

                    if (AtomicCas(t, nt.Get(), nullptr)) {
                        return nt.Release();
                    }
                }

                return result;
            }

        private:
            T* volatile T_[sizeof(size_t) * 8];
        };

        class TRequestData: public TNonCopyable {
        public:
            using TPtr = TAutoPtr<TRequestData>;
            using TParts = TVector<IOutputStream::TPart>;

            inline TRequestData(size_t memSize)
                : Mem(memSize)
            {
            }

            inline void SendTo(IOutputStream& io) const {
                io.Write(Parts_.data(), Parts_.size());
            }

            inline void AddPart(const void* buf, size_t len) noexcept {
                Parts_.push_back(IOutputStream::TPart(buf, len));
            }

            const TParts& Parts() const noexcept {
                return Parts_;
            }

            TVector<char> Mem;

        private:
            TParts Parts_;
        };

        struct TRequestSettings {
            bool NoDelay = true;
            EResolverType ResolverType = EResolverType::ETCP;
            bool UseAsyncSendRequest = false;

            TRequestSettings& SetNoDelay(bool noDelay) {
                NoDelay = noDelay;
                return *this;
            }

            TRequestSettings& SetResolverType(EResolverType resolverType) {
                ResolverType = resolverType;
                return *this;
            }

            TRequestSettings& SetUseAsyncSendRequest(bool useAsyncSendRequest) {
                UseAsyncSendRequest = useAsyncSendRequest;
                return *this;
            }
        };

        struct TRequestGet {
            static TRequestData::TPtr Build(const TMessage& msg, const TParsedLocation& loc) {
                TRequestData::TPtr req(new TRequestData(50 + loc.Service.size() + msg.Data.size() + loc.Host.size()));
                TMemoryOutput out(req->Mem.data(), req->Mem.size());

                out << TStringBuf("GET /") << loc.Service;

                if (!!msg.Data) {
                    out << '?' << msg.Data;
                }

                out << TStringBuf(" HTTP/1.1\r\nHost: ") << loc.Host;

                if (!!loc.Port) {
                    out << TStringBuf(":") << loc.Port;
                }

                out << TStringBuf("\r\n\r\n");

                req->AddPart(req->Mem.data(), out.Buf() - req->Mem.data());
                return req;
            }

            static inline TStringBuf Name() noexcept {
                return TStringBuf("http");
            }

            static TRequestSettings RequestSettings() {
                return TRequestSettings();
            }
        };

        struct TRequestPost {
            static TRequestData::TPtr Build(const TMessage& msg, const TParsedLocation& loc) {
                TRequestData::TPtr req(new TRequestData(100 + loc.Service.size() + loc.Host.size()));
                TMemoryOutput out(req->Mem.data(), req->Mem.size());

                out << TStringBuf("POST /") << loc.Service
                    << TStringBuf(" HTTP/1.1\r\nHost: ") << loc.Host;

                if (!!loc.Port) {
                    out << TStringBuf(":") << loc.Port;
                }

                out << TStringBuf("\r\nContent-Length: ") << msg.Data.size() << TStringBuf("\r\n\r\n");

                req->AddPart(req->Mem.data(), out.Buf() - req->Mem.data());
                req->AddPart(msg.Data.data(), msg.Data.size());
                return req;
            }

            static inline TStringBuf Name() noexcept {
                return TStringBuf("post");
            }

            static TRequestSettings RequestSettings() {
                return TRequestSettings();
            }
        };

        struct TRequestFull {
            static TRequestData::TPtr Build(const TMessage& msg, const TParsedLocation&) {
                TRequestData::TPtr req(new TRequestData(0));
                req->AddPart(msg.Data.data(), msg.Data.size());
                return req;
            }

            static inline TStringBuf Name() noexcept {
                return TStringBuf("full");
            }

            static TRequestSettings RequestSettings() {
                return TRequestSettings();
            }
        };

        enum class ERequestType {
            Any = 0 /* "ANY" */,
            Post    /* "POST" */,
            Get     /* "GET" */,
            Put     /* "PUT" */,
            Delete  /* "DELETE" */,
            Patch   /* "PATCH" */,
        };

        enum class ERequestFlag {
            None = 0,
            /** use absoulte uri for proxy requests in the first request line
         * POST http://ya.ru HTTP/1.1
         * @see https://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
         */
            AbsoluteUri = 1,
        };

        Y_DECLARE_FLAGS(ERequestFlags, ERequestFlag)
        Y_DECLARE_OPERATORS_FOR_FLAGS(ERequestFlags)

        static constexpr ERequestType DefaultRequestType = ERequestType::Any;

        extern const TStringBuf DefaultContentType;

        /// @brief `MakeFullRequest` transmutes http/post/http2/post2 message to full/full2 with
        /// additional HTTP headers and/or content data.
        ///
        /// If reqType is `Any`, then request type is POST, unless content is empty and schema
        /// prefix is http/https/http2, in that case request type is GET.
        ///
        /// @msg[in]        Will get URL from `msg.Data`.
        bool MakeFullRequest(TMessage& msg, TStringBuf headers, TStringBuf content, TStringBuf contentType = DefaultContentType, ERequestType reqType = DefaultRequestType, ERequestFlags flags = ERequestFlag::None);

        /// @see `MakeFullrequest`.
        ///
        /// @urlParts[in]       Will construct url from `urlParts`, `msg.Data` is not used.
        bool MakeFullRequest(TMessage& msg, TConstArrayRef<TString> urlParts, TStringBuf headers, TStringBuf content, TStringBuf contentType = DefaultContentType, ERequestType reqType = DefaultRequestType, ERequestFlags flags = ERequestFlag::None);

        /// Same as `MakeFullRequest` but it will add ERequestFlag::AbsoluteUri to the @a flags
        /// and replace msg.Addr with @a proxyAddr
        ///
        /// @see `MakeFullrequest`.
        bool MakeFullProxyRequest(TMessage& msg, TStringBuf proxyAddr, TStringBuf headers, TStringBuf content, TStringBuf contentType = DefaultContentType, ERequestType reqType = DefaultRequestType, ERequestFlags flags = ERequestFlag::None);

        size_t GetUrlPartsLength(TConstArrayRef<TString> urlParts);
        //part1&part2&...
        void JoinUrlParts(TConstArrayRef<TString> urlParts, IOutputStream& out);
        //'?' + JoinUrlParts
        void WriteUrlParts(TConstArrayRef<TString> urlParts, IOutputStream& out);

        bool IsHttpScheme(TStringBuf scheme);
    }
}