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cpl_http.h
Go to the documentation of this file.
1 /******************************************************************************
2 * $Id$
3 *
4 * Project: Common Portability Library
5 * Purpose: Function wrapper for libcurl HTTP access.
6 * Author: Frank Warmerdam, warmerdam@pobox.com
7 *
8 ******************************************************************************
9 * Copyright (c) 2006, Frank Warmerdam
10 * Copyright (c) 2009, Even Rouault <even dot rouault at mines-paris dot org>
11 *
12 * Permission is hereby granted, free of charge, to any person obtaining a
13 * copy of this software and associated documentation files (the "Software"),
14 * to deal in the Software without restriction, including without limitation
15 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
16 * and/or sell copies of the Software, and to permit persons to whom the
17 * Software is furnished to do so, subject to the following conditions:
18 *
19 * The above copyright notice and this permission notice shall be included
20 * in all copies or substantial portions of the Software.
21 *
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
23 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
28 * DEALINGS IN THE SOFTWARE.
29 ****************************************************************************/
30
31 #ifndef CPL_HTTP_H_INCLUDED
32 #define CPL_HTTP_H_INCLUDED
33
34 #include "cpl_conv.h"
35 #include "cpl_string.h"
36 #include "cpl_progress.h"
37 #include "cpl_vsi.h"
38
46 #define CPL_HTTP_MAX_RETRY 0
47 #define CPL_HTTP_RETRY_DELAY 30.0
48
50 CPL_C_START
51
53 typedef struct { char **papszHeaders;
55 GByte *pabyData; int nDataLen;
58 } CPLMimePart;
59
61 typedef struct {
63 int nStatus;
64
66 char *pszContentType;
67
69 char *pszErrBuf;
70
72 int nDataLen;
74 int nDataAlloc;
75
77 GByte *pabyData;
78
80 char **papszHeaders;
81
83 int nMimePartCount;
84
86 CPLMimePart *pasMimePart;
87
88 } CPLHTTPResult;
89
91 typedef size_t (*CPLHTTPFetchWriteFunc)(void *pBuffer, size_t nSize, size_t nMemb, void *pWriteArg);
94 int CPL_DLL CPLHTTPEnabled( void );
95 CPLHTTPResult CPL_DLL *CPLHTTPFetch( const char *pszURL, CSLConstList papszOptions);
96 CPLHTTPResult CPL_DLL *CPLHTTPFetchEx( const char *pszURL,CSLConstList papszOptions,
97 GDALProgressFunc pfnProgress,
98 void *pProgressArg,
99 CPLHTTPFetchWriteFunc pfnWrite,
100 void *pWriteArg);
101 CPLHTTPResult CPL_DLL **CPLHTTPMultiFetch( const char * const * papszURL,
102 int nURLCount,
103 int nMaxSimultaneous,
104 CSLConstList papszOptions);
105
106 void CPL_DLL CPLHTTPCleanup( void );
107 void CPL_DLL CPLHTTPDestroyResult( CPLHTTPResult *psResult );
108 void CPL_DLL CPLHTTPDestroyMultiResult( CPLHTTPResult **papsResults, int nCount );
109 int CPL_DLL CPLHTTPParseMultipartMime( CPLHTTPResult *psResult );
110
111 /* -------------------------------------------------------------------- */
112 /* The following is related to OAuth2 authorization around */
113 /* google services like fusion tables, and potentially others */
114 /* in the future. Code in cpl_google_oauth2.cpp. */
115 /* */
116 /* These services are built on CPL HTTP services. */
117 /* -------------------------------------------------------------------- */
118
119 char CPL_DLL *GOA2GetAuthorizationURL( const char *pszScope );
120 char CPL_DLL *GOA2GetRefreshToken( const char *pszAuthToken,
121 const char *pszScope );
122 char CPL_DLL *GOA2GetAccessToken( const char *pszRefreshToken,
123 const char *pszScope );
124
125 char CPL_DLL **GOA2GetAccessTokenFromServiceAccount(
126 const char* pszPrivateKey,
127 const char* pszClientEmail,
128 const char* pszScope,
129 CSLConstList papszAdditionalClaims,
130 CSLConstList papszOptions);
131
132 char CPL_DLL **GOA2GetAccessTokenFromCloudEngineVM( CSLConstList papszOptions );
133
134 CPL_C_END
135
136 #if defined(__cplusplus) && !defined(CPL_SUPRESS_CPLUSPLUS)
137
138 // Not sure if this belong here, used in cpl_http.cpp, cpl_vsil_curl.cpp and frmts/wms/gdalhttp.cpp
139 void* CPLHTTPSetOptions(void *pcurl, const char * const* papszOptions);
140 char** CPLHTTPGetOptionsFromEnv();
141 double CPLHTTPGetNewRetryDelay(int response_code, double dfOldDelay);
142 void* CPLHTTPIgnoreSigPipe();
143 void CPLHTTPRestoreSigPipeHandler(void* old_handler);
144 bool CPLMultiPerformWait(void* hCurlMultiHandle, int& repeats);
147 bool CPLIsMachinePotentiallyGCEInstance();
148 bool CPLIsMachineForSureGCEInstance();
149
157 class GOA2Manager
158 {
159 public:
160
161 GOA2Manager();
162
164 typedef enum
165 {
166 NONE,
167 GCE,
168 ACCESS_TOKEN_FROM_REFRESH,
169 SERVICE_ACCOUNT
170 } AuthMethod;
171
172 bool SetAuthFromGCE( CSLConstList papszOptions );
173 bool SetAuthFromRefreshToken( const char* pszRefreshToken,
174 const char* pszClientId,
175 const char* pszClientSecret,
176 CSLConstList papszOptions );
177 bool SetAuthFromServiceAccount(const char* pszPrivateKey,
178 const char* pszClientEmail,
179 const char* pszScope,
180 CSLConstList papszAdditionalClaims,
181 CSLConstList papszOptions );
182
184 AuthMethod GetAuthMethod() const { return m_eMethod; }
185
186 const char* GetBearer() const;
187
189 const CPLString& GetPrivateKey() const { return m_osPrivateKey; }
190
192 const CPLString& GetClientEmail() const { return m_osClientEmail; }
193
194 private:
195
196 mutable CPLString m_osCurrentBearer;
197 mutable time_t m_nExpirationTime;
198 AuthMethod m_eMethod;
199
200 // for ACCESS_TOKEN_FROM_REFRESH
201 CPLString m_osClientId;
202 CPLString m_osClientSecret;
203 CPLString m_osRefreshToken;
204
205 // for SERVICE_ACCOUNT
206 CPLString m_osPrivateKey;
207 CPLString m_osClientEmail;
208 CPLString m_osScope;
209 CPLStringList m_aosAdditionalClaims;
210
211 CPLStringList m_aosOptions;
212 };
213
214
215 #endif // __cplusplus
216
217 #endif /* ndef CPL_HTTP_H_INCLUDED */
CPLHTTPResult::pasMimePart
CPLMimePart * pasMimePart
Definition: cpl_http.h:86
GOA2Manager::GetClientEmail
const CPLString & GetClientEmail() const
Returns client email for SERVICE_ACCOUNT method.
Definition: cpl_http.h:192
cpl_vsi.h
Standard C Covers.
CPLHTTPFetch
CPLHTTPResult * CPLHTTPFetch(const char *pszURL, CSLConstList papszOptions)
Fetch a document from an url and return in a string.
Definition: cpl_http.cpp:620
CPL_C_START
#define CPL_C_START
Macro to start a block of C symbols.
Definition: cpl_port.h:335
CPLIsMachineForSureGCEInstance
bool CPLIsMachineForSureGCEInstance()
Returns whether the current machine is surely a Google Compute Engine instance.
Definition: cpl_google_cloud.cpp:58
CPLHTTPCleanup
void CPLHTTPCleanup(void)
Cleanup function to call at application termination.
Definition: cpl_http.cpp:1870
CPLHTTPResult::pszContentType
char * pszContentType
Definition: cpl_http.h:66
GOA2Manager::GetPrivateKey
const CPLString & GetPrivateKey() const
Returns private key for SERVICE_ACCOUNT method.
Definition: cpl_http.h:189
CPLHTTPParseMultipartMime
int CPLHTTPParseMultipartMime(CPLHTTPResult *psResult)
Parses a MIME multipart message.
Definition: cpl_http.cpp:1965
CPLHTTPDestroyResult
void CPLHTTPDestroyResult(CPLHTTPResult *psResult)
Clean the memory associated with the return value of CPLHTTPFetch()
Definition: cpl_http.cpp:1932
CPLHTTPFetchEx
CPLHTTPResult * CPLHTTPFetchEx(const char *pszURL, CSLConstList papszOptions, GDALProgressFunc pfnProgress, void *pProgressArg, CPLHTTPFetchWriteFunc pfnWrite, void *pWriteArg)
Fetch a document from an url and return in a string.
Definition: cpl_http.cpp:636
GByte
unsigned char GByte
Unsigned byte type.
Definition: cpl_port.h:213
CPLHTTPResult::papszHeaders
char ** papszHeaders
Definition: cpl_http.h:80
GOA2Manager::GetBearer
const char * GetBearer() const
Return the access token.
Definition: cpl_google_oauth2.cpp:681
CPLString
Convenient string class based on std::string.
Definition: cpl_string.h:336
GOA2GetAccessTokenFromCloudEngineVM
char ** GOA2GetAccessTokenFromCloudEngineVM(CSLConstList papszOptions)
Fetch access token using Cloud Engine internal REST API.
Definition: cpl_google_oauth2.cpp:418
CPLHTTPMultiFetch
CPLHTTPResult ** CPLHTTPMultiFetch(const char *const *papszURL, int nURLCount, int nMaxSimultaneous, CSLConstList papszOptions)
Fetch several documents at once.
Definition: cpl_http.cpp:1102
GOA2GetAccessToken
char * GOA2GetAccessToken(const char *pszRefreshToken, const char *pszScope)
Fetch access token using refresh token.
Definition: cpl_google_oauth2.cpp:387
cpl_string.h
Various convenience functions for working with strings and string lists.
GOA2Manager::SetAuthFromRefreshToken
bool SetAuthFromRefreshToken(const char *pszRefreshToken, const char *pszClientId, const char *pszClientSecret, CSLConstList papszOptions)
Specifies that the authentication will be done using the OAuth2 client id method. ...
Definition: cpl_google_oauth2.cpp:599
GOA2Manager::GetAuthMethod
AuthMethod GetAuthMethod() const
Returns the authentication method.
Definition: cpl_http.h:184
CPLHTTPEnabled
int CPLHTTPEnabled(void)
Return if CPLHTTP services can be useful.
Definition: cpl_http.cpp:1853
GOA2Manager::SetAuthFromGCE
bool SetAuthFromGCE(CSLConstList papszOptions)
Specifies that the authentication will be done using the local credentials of the current Google Comp...
Definition: cpl_google_oauth2.cpp:574
CSLConstList
char ** CSLConstList
Type of a constant null-terminated list of nul terminated strings.
Definition: cpl_port.h:1184
CPLHTTPResult::nMimePartCount
int nMimePartCount
Definition: cpl_http.h:83
GOA2Manager::SetAuthFromServiceAccount
bool SetAuthFromServiceAccount(const char *pszPrivateKey, const char *pszClientEmail, const char *pszScope, CSLConstList papszAdditionalClaims, CSLConstList papszOptions)
Specifies that the authentication will be done using the OAuth2 service account method.
Definition: cpl_google_oauth2.cpp:635
CPLHTTPDestroyMultiResult
void CPLHTTPDestroyMultiResult(CPLHTTPResult **papsResults, int nCount)
Clean the memory associated with the return value of CPLHTTPMultiFetch()
Definition: cpl_http.cpp:1350
CPLStringList
String list class designed around our use of C "char**" string lists.
Definition: cpl_string.h:447
CPLHTTPResult::nDataAlloc
int nDataAlloc
Definition: cpl_http.h:74
CPLHTTPResult::nDataLen
int nDataLen
Definition: cpl_http.h:72
cpl_conv.h
Various convenience functions for CPL.
GOA2Manager::AuthMethod
AuthMethod
Authentication method.
Definition: cpl_http.h:164
CPLIsMachinePotentiallyGCEInstance
bool CPLIsMachinePotentiallyGCEInstance()
Returns whether the current machine is potentially a Google Compute Engine instance.
Definition: cpl_google_cloud.cpp:120
CPLHTTPResult
Definition: cpl_http.h:61
CPLHTTPResult::nStatus
int nStatus
Definition: cpl_http.h:63
GOA2Manager
Manager of Google OAuth2 authentication.
Definition: cpl_http.h:157
GOA2GetAccessTokenFromServiceAccount
char ** GOA2GetAccessTokenFromServiceAccount(const char *pszPrivateKey, const char *pszClientEmail, const char *pszScope, CSLConstList papszAdditionalClaims, CSLConstList papszOptions)
Fetch access token using Service Account OAuth2.
Definition: cpl_google_oauth2.cpp:459
CPLHTTPResult::pabyData
GByte * pabyData
Definition: cpl_http.h:77
CPLMimePart
Definition: cpl_http.h:53
CPL_C_END
#define CPL_C_END
Macro to end a block of C symbols.
Definition: cpl_port.h:337
CPLHTTPResult::pszErrBuf
char * pszErrBuf
Definition: cpl_http.h:69
GOA2GetRefreshToken
char * GOA2GetRefreshToken(const char *pszAuthToken, const char *pszScope)
Turn Auth Token into a Refresh Token.
Definition: cpl_google_oauth2.cpp:164
GOA2GetAuthorizationURL
char * GOA2GetAuthorizationURL(const char *pszScope)
Return authorization url for a given scope.
Definition: cpl_google_oauth2.cpp:127
GOA2Manager::GOA2Manager
GOA2Manager()
Constructor.
Definition: cpl_google_oauth2.cpp:556

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