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1 | (* |
2 | * Licensed to the Apache Software Foundation (ASF) under one | |
3 | * or more contributor license agreements. See the NOTICE file | |
4 | * distributed with this work for additional information | |
5 | * regarding copyright ownership. The ASF licenses this file | |
6 | * to you under the Apache License, Version 2.0 (the | |
7 | * "License"); you may not use this file except in compliance | |
8 | * with the License. You may obtain a copy of the License at | |
9 | * | |
10 | * http://www.apache.org/licenses/LICENSE-2.0 | |
11 | * | |
12 | * Unless required by applicable law or agreed to in writing, | |
13 | * software distributed under the License is distributed on an | |
14 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
15 | * KIND, either express or implied. See the License for the | |
16 | * specific language governing permissions and limitations | |
17 | * under the License. | |
18 | *) | |
19 | unit Thrift.Transport.MsxmlHTTP; | |
20 | ||
21 | {$I Thrift.Defines.inc} | |
22 | {$SCOPEDENUMS ON} | |
23 | ||
24 | interface | |
25 | ||
26 | uses | |
27 | Classes, | |
28 | SysUtils, | |
29 | Math, | |
30 | Generics.Collections, | |
31 | {$IFDEF OLD_UNIT_NAMES} | |
32 | ActiveX, msxml, | |
33 | {$ELSE} | |
34 | Winapi.ActiveX, Winapi.msxml, | |
35 | {$ENDIF} | |
36 | Thrift.Collections, | |
37 | Thrift.Transport, | |
38 | Thrift.Exception, | |
39 | Thrift.Utils, | |
40 | Thrift.Stream; | |
41 | ||
42 | type | |
43 | TMsxmlHTTPClientImpl = class( TTransportImpl, IHTTPClient) | |
44 | private | |
45 | FUri : string; | |
46 | FInputStream : IThriftStream; | |
47 | FOutputStream : IThriftStream; | |
48 | FDnsResolveTimeout : Integer; | |
49 | FConnectionTimeout : Integer; | |
50 | FSendTimeout : Integer; | |
51 | FReadTimeout : Integer; | |
52 | FCustomHeaders : IThriftDictionary<string,string>; | |
53 | ||
54 | function CreateRequest: IXMLHTTPRequest; | |
55 | protected | |
56 | function GetIsOpen: Boolean; override; | |
57 | procedure Open(); override; | |
58 | procedure Close(); override; | |
59 | function Read( const pBuf : Pointer; const buflen : Integer; off: Integer; len: Integer): Integer; override; | |
60 | procedure Write( const pBuf : Pointer; off, len : Integer); override; | |
61 | procedure Flush; override; | |
62 | ||
63 | procedure SetDnsResolveTimeout(const Value: Integer); | |
64 | function GetDnsResolveTimeout: Integer; | |
65 | procedure SetConnectionTimeout(const Value: Integer); | |
66 | function GetConnectionTimeout: Integer; | |
67 | procedure SetSendTimeout(const Value: Integer); | |
68 | function GetSendTimeout: Integer; | |
69 | procedure SetReadTimeout(const Value: Integer); | |
70 | function GetReadTimeout: Integer; | |
71 | function GetSecureProtocols : TSecureProtocols; | |
72 | procedure SetSecureProtocols( const value : TSecureProtocols); | |
73 | ||
74 | function GetCustomHeaders: IThriftDictionary<string,string>; | |
75 | procedure SendRequest; | |
76 | ||
77 | property DnsResolveTimeout: Integer read GetDnsResolveTimeout write SetDnsResolveTimeout; | |
78 | property ConnectionTimeout: Integer read GetConnectionTimeout write SetConnectionTimeout; | |
79 | property SendTimeout: Integer read GetSendTimeout write SetSendTimeout; | |
80 | property ReadTimeout: Integer read GetReadTimeout write SetReadTimeout; | |
81 | property CustomHeaders: IThriftDictionary<string,string> read GetCustomHeaders; | |
82 | public | |
83 | constructor Create( const AUri: string); | |
84 | destructor Destroy; override; | |
85 | end; | |
86 | ||
87 | ||
88 | implementation | |
89 | ||
90 | ||
91 | { TMsxmlHTTPClientImpl } | |
92 | ||
93 | constructor TMsxmlHTTPClientImpl.Create(const AUri: string); | |
94 | begin | |
95 | inherited Create; | |
96 | FUri := AUri; | |
97 | ||
98 | // defaults according to MSDN | |
99 | FDnsResolveTimeout := 0; // no timeout | |
100 | FConnectionTimeout := 60 * 1000; | |
101 | FSendTimeout := 30 * 1000; | |
102 | FReadTimeout := 30 * 1000; | |
103 | ||
104 | FCustomHeaders := TThriftDictionaryImpl<string,string>.Create; | |
105 | FOutputStream := TThriftStreamAdapterDelphi.Create( TMemoryStream.Create, True); | |
106 | end; | |
107 | ||
108 | function TMsxmlHTTPClientImpl.CreateRequest: IXMLHTTPRequest; | |
109 | var | |
110 | pair : TPair<string,string>; | |
111 | srvHttp : IServerXMLHTTPRequest; | |
112 | begin | |
113 | {$IF CompilerVersion >= 21.0} | |
114 | Result := CoServerXMLHTTP.Create; | |
115 | {$ELSE} | |
116 | Result := CoXMLHTTPRequest.Create; | |
117 | {$IFEND} | |
118 | ||
119 | // setting a timeout value to 0 (zero) means "no timeout" for that setting | |
120 | if Supports( result, IServerXMLHTTPRequest, srvHttp) | |
121 | then srvHttp.setTimeouts( DnsResolveTimeout, ConnectionTimeout, SendTimeout, ReadTimeout); | |
122 | ||
123 | Result.open('POST', FUri, False, '', ''); | |
124 | Result.setRequestHeader( 'Content-Type', THRIFT_MIMETYPE); | |
125 | Result.setRequestHeader( 'Accept', THRIFT_MIMETYPE); | |
126 | Result.setRequestHeader( 'User-Agent', 'Delphi/IHTTPClient'); | |
127 | ||
128 | for pair in FCustomHeaders do begin | |
129 | Result.setRequestHeader( pair.Key, pair.Value ); | |
130 | end; | |
131 | end; | |
132 | ||
133 | destructor TMsxmlHTTPClientImpl.Destroy; | |
134 | begin | |
135 | Close; | |
136 | inherited; | |
137 | end; | |
138 | ||
139 | function TMsxmlHTTPClientImpl.GetDnsResolveTimeout: Integer; | |
140 | begin | |
141 | Result := FDnsResolveTimeout; | |
142 | end; | |
143 | ||
144 | procedure TMsxmlHTTPClientImpl.SetDnsResolveTimeout(const Value: Integer); | |
145 | begin | |
146 | FDnsResolveTimeout := Value; | |
147 | end; | |
148 | ||
149 | function TMsxmlHTTPClientImpl.GetConnectionTimeout: Integer; | |
150 | begin | |
151 | Result := FConnectionTimeout; | |
152 | end; | |
153 | ||
154 | procedure TMsxmlHTTPClientImpl.SetConnectionTimeout(const Value: Integer); | |
155 | begin | |
156 | FConnectionTimeout := Value; | |
157 | end; | |
158 | ||
159 | function TMsxmlHTTPClientImpl.GetSendTimeout: Integer; | |
160 | begin | |
161 | Result := FSendTimeout; | |
162 | end; | |
163 | ||
164 | procedure TMsxmlHTTPClientImpl.SetSendTimeout(const Value: Integer); | |
165 | begin | |
166 | FSendTimeout := Value; | |
167 | end; | |
168 | ||
169 | function TMsxmlHTTPClientImpl.GetReadTimeout: Integer; | |
170 | begin | |
171 | Result := FReadTimeout; | |
172 | end; | |
173 | ||
174 | procedure TMsxmlHTTPClientImpl.SetReadTimeout(const Value: Integer); | |
175 | begin | |
176 | FReadTimeout := Value; | |
177 | end; | |
178 | ||
179 | function TMsxmlHTTPClientImpl.GetSecureProtocols : TSecureProtocols; | |
180 | begin | |
181 | Result := []; | |
182 | end; | |
183 | ||
184 | procedure TMsxmlHTTPClientImpl.SetSecureProtocols( const value : TSecureProtocols); | |
185 | begin | |
186 | raise TTransportExceptionBadArgs.Create('SetSecureProtocols: Not supported with '+ClassName); | |
187 | end; | |
188 | ||
189 | function TMsxmlHTTPClientImpl.GetCustomHeaders: IThriftDictionary<string,string>; | |
190 | begin | |
191 | Result := FCustomHeaders; | |
192 | end; | |
193 | ||
194 | function TMsxmlHTTPClientImpl.GetIsOpen: Boolean; | |
195 | begin | |
196 | Result := True; | |
197 | end; | |
198 | ||
199 | procedure TMsxmlHTTPClientImpl.Open; | |
200 | begin | |
201 | FOutputStream := TThriftStreamAdapterDelphi.Create( TMemoryStream.Create, True); | |
202 | end; | |
203 | ||
204 | procedure TMsxmlHTTPClientImpl.Close; | |
205 | begin | |
206 | FInputStream := nil; | |
207 | FOutputStream := nil; | |
208 | end; | |
209 | ||
210 | procedure TMsxmlHTTPClientImpl.Flush; | |
211 | begin | |
212 | try | |
213 | SendRequest; | |
214 | finally | |
215 | FOutputStream := nil; | |
216 | FOutputStream := TThriftStreamAdapterDelphi.Create( TMemoryStream.Create, True); | |
217 | ASSERT( FOutputStream <> nil); | |
218 | end; | |
219 | end; | |
220 | ||
221 | function TMsxmlHTTPClientImpl.Read( const pBuf : Pointer; const buflen : Integer; off: Integer; len: Integer): Integer; | |
222 | begin | |
223 | if FInputStream = nil then begin | |
224 | raise TTransportExceptionNotOpen.Create('No request has been sent'); | |
225 | end; | |
226 | ||
227 | try | |
228 | Result := FInputStream.Read( pBuf, buflen, off, len) | |
229 | except | |
230 | on E: Exception | |
231 | do raise TTransportExceptionUnknown.Create(E.Message); | |
232 | end; | |
233 | end; | |
234 | ||
235 | procedure TMsxmlHTTPClientImpl.SendRequest; | |
236 | var | |
237 | xmlhttp : IXMLHTTPRequest; | |
238 | ms : TMemoryStream; | |
239 | a : TBytes; | |
240 | len : Integer; | |
241 | begin | |
242 | xmlhttp := CreateRequest; | |
243 | ||
244 | ms := TMemoryStream.Create; | |
245 | try | |
246 | a := FOutputStream.ToArray; | |
247 | len := Length(a); | |
248 | if len > 0 then begin | |
249 | ms.WriteBuffer( Pointer(@a[0])^, len); | |
250 | end; | |
251 | ms.Position := 0; | |
252 | xmlhttp.send( IUnknown( TStreamAdapter.Create( ms, soReference ))); | |
253 | FInputStream := nil; | |
254 | FInputStream := TThriftStreamAdapterCOM.Create( IUnknown( xmlhttp.responseStream) as IStream); | |
255 | finally | |
256 | ms.Free; | |
257 | end; | |
258 | end; | |
259 | ||
260 | procedure TMsxmlHTTPClientImpl.Write( const pBuf : Pointer; off, len : Integer); | |
261 | begin | |
262 | FOutputStream.Write( pBuf, off, len); | |
263 | end; | |
264 | ||
265 | ||
266 | ||
267 | end. | |
268 |