Actual source code: google.c


  2: #include <petscwebclient.h>
  3: #pragma clang diagnostic ignored "-Wdeprecated-declarations"
  4: #pragma gcc diagnostic   ignored "-Wdeprecated-declarations"

  6: /*
  7:    These variables identify the code as a PETSc application to Google.

  9:    See -   https://stackoverflow.com/questions/4616553/using-oauth-in-free-open-source-software
 10:    Users can get their own application IDs - https://code.google.com/p/google-apps-manager/wiki/GettingAnOAuthConsoleKey

 12: */
 13: #define PETSC_GOOGLE_CLIENT_ID "521429262559-i19i57eek8tnt9ftpp4p91rcl0bo9ag5.apps.googleusercontent.com"
 14: #define PETSC_GOOGLE_CLIENT_ST "vOds_A71I3_S_aHMq_kZAI0t"
 15: #define PETSC_GOOGLE_API_KEY   "AIzaSyDRZsOcySpWVzsUvIBL2UG3J2tcg-MXbyk"

 17: /*@C
 18:      PetscGoogleDriveRefresh - Get a new authorization token for accessing Google drive from PETSc from a refresh token

 20:    Not collective, only the first process in the `MPI_Comm` does anything

 22:    Input Parameters:
 23: +   comm - MPI communicator
 24: .   refresh token - obtained with `PetscGoogleDriveAuthorize()`, if NULL PETSc will first look for one in the options data
 25:                     if not found it will call `PetscGoogleDriveAuthorize()`
 26: -   tokensize - size of the output string access_token

 28:    Output Parameter:
 29: .   access_token - token that can be passed to `PetscGoogleDriveUpload()`

 31:    Options Database Key:
 32: .  -google_refresh_token XXX - where XXX was obtained from `PetscGoogleDriveAuthorize()`

 34:    Level: intermediate

 36: .seealso: `PetscURLShorten()`, `PetscGoogleDriveAuthorize()`, `PetscGoogleDriveUpload()`
 37: @*/
 38: PetscErrorCode PetscGoogleDriveRefresh(MPI_Comm comm, const char refresh_token[], char access_token[], size_t tokensize)
 39: {
 40:   SSL_CTX    *ctx;
 41:   SSL        *ssl;
 42:   int         sock;
 43:   char        buff[8 * 1024], body[1024];
 44:   PetscMPIInt rank;
 45:   char       *refreshtoken = (char *)refresh_token;
 46:   PetscBool   found;

 48:   PetscFunctionBegin;
 49:   PetscCallMPI(MPI_Comm_rank(comm, &rank));
 50:   if (rank == 0) {
 51:     if (!refresh_token) {
 52:       PetscBool set;
 53:       PetscCall(PetscMalloc1(512, &refreshtoken));
 54:       PetscCall(PetscOptionsGetString(NULL, NULL, "-google_refresh_token", refreshtoken, sizeof(refreshtoken), &set));
 55:       if (!set) {
 56:         PetscCall(PetscGoogleDriveAuthorize(comm, access_token, refreshtoken, 512 * sizeof(char)));
 57:         PetscCall(PetscFree(refreshtoken));
 58:         PetscFunctionReturn(PETSC_SUCCESS);
 59:       }
 60:     }
 61:     PetscCall(PetscSSLInitializeContext(&ctx));
 62:     PetscCall(PetscHTTPSConnect("accounts.google.com", 443, ctx, &sock, &ssl));
 63:     PetscCall(PetscStrcpy(body, "client_id="));
 64:     PetscCall(PetscStrcat(body, PETSC_GOOGLE_CLIENT_ID));
 65:     PetscCall(PetscStrcat(body, "&client_secret="));
 66:     PetscCall(PetscStrcat(body, PETSC_GOOGLE_CLIENT_ST));
 67:     PetscCall(PetscStrcat(body, "&refresh_token="));
 68:     PetscCall(PetscStrcat(body, refreshtoken));
 69:     if (!refresh_token) PetscCall(PetscFree(refreshtoken));
 70:     PetscCall(PetscStrcat(body, "&grant_type=refresh_token"));

 72:     PetscCall(PetscHTTPSRequest("POST", "accounts.google.com/o/oauth2/token", NULL, "application/x-www-form-urlencoded", body, ssl, buff, sizeof(buff)));
 73:     PetscCall(PetscSSLDestroyContext(ctx));
 74:     close(sock);

 76:     PetscCall(PetscPullJSONValue(buff, "access_token", access_token, tokensize, &found));
 77:     PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_LIB, "Google drive did not return access_token");
 78:   }
 79:   PetscFunctionReturn(PETSC_SUCCESS);
 80: }

 82: #include <sys/stat.h>

 84: /*@C
 85:      PetscGoogleDriveUpload - Loads a file to the Google Drive

 87:      Not collective, only the first process in the `MPI_Comm` uploads the file

 89:   Input Parameters:
 90: +   comm - MPI communicator
 91: .   access_token - obtained with PetscGoogleDriveRefresh(), pass NULL to have PETSc generate one
 92: -   filename - file to upload; if you upload multiple times it will have different names each time on Google Drive

 94:   Options Database Key:
 95: .  -google_refresh_token XXX - pass the access token for the operation

 97:   Usage Patterns:
 98: .vb
 99:     With PETSc option -google_refresh_token  XXX given
100:     PetscGoogleDriveUpload(comm,NULL,filename);        will upload file with no user interaction

102:     Without PETSc option -google_refresh_token XXX given
103:     PetscGoogleDriveUpload(comm,NULL,filename);        for first use will prompt user to authorize access to Google Drive with their browser

105:     With PETSc option -google_refresh_token  XXX given
106:     PetscGoogleDriveRefresh(comm,NULL,access_token,sizeof(access_token));
107:     PetscGoogleDriveUpload(comm,access_token,filename);

109:     With refresh token entered in some way by the user
110:     PetscGoogleDriveRefresh(comm,refresh_token,access_token,sizeof(access_token));
111:     PetscGoogleDriveUpload(comm,access_token,filename);

113:     PetscGoogleDriveAuthorize(comm,access_token,refresh_token,sizeof(access_token));
114:     PetscGoogleDriveUpload(comm,access_token,filename);
115: .ve

117:    Level: intermediate

119: .seealso: `PetscURLShorten()`, `PetscGoogleDriveAuthorize()`, `PetscGoogleDriveRefresh()`
120: @*/
121: PetscErrorCode PetscGoogleDriveUpload(MPI_Comm comm, const char access_token[], const char filename[])
122: {
123:   SSL_CTX    *ctx;
124:   SSL        *ssl;
125:   int         sock;
126:   char        head[1024], buff[8 * 1024], *body, *title;
127:   PetscMPIInt rank;
128:   struct stat sb;
129:   size_t      len, blen, rd;
130:   FILE       *fd;
131:   int         err;

133:   PetscFunctionBegin;
134:   PetscCallMPI(MPI_Comm_rank(comm, &rank));
135:   if (rank == 0) {
136:     PetscCall(PetscStrcpy(head, "Authorization: Bearer "));
137:     PetscCall(PetscStrcat(head, access_token));
138:     PetscCall(PetscStrcat(head, "\r\n"));
139:     PetscCall(PetscStrcat(head, "uploadType: multipart\r\n"));

141:     err = stat(filename, &sb);
142:     PetscCheck(!err, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to stat file: %s", filename);
143:     len = 1024 + sb.st_size;
144:     PetscCall(PetscMalloc1(len, &body));
145:     PetscCall(PetscStrcpy(body, "--foo_bar_baz\r\n"
146:                                 "Content-Type: application/json\r\n\r\n"
147:                                 "{"));
148:     PetscCall(PetscPushJSONValue(body, "title", filename, len));
149:     PetscCall(PetscStrcat(body, ","));
150:     PetscCall(PetscPushJSONValue(body, "mimeType", "text.html", len));
151:     PetscCall(PetscStrcat(body, ","));
152:     PetscCall(PetscPushJSONValue(body, "description", "a file", len));
153:     PetscCall(PetscStrcat(body, "}\r\n\r\n"
154:                                 "--foo_bar_baz\r\n"
155:                                 "Content-Type: text/html\r\n\r\n"));
156:     PetscCall(PetscStrlen(body, &blen));
157:     fd = fopen(filename, "r");
158:     PetscCheck(fd, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to open file: %s", filename);
159:     rd = fread(body + blen, sizeof(unsigned char), sb.st_size, fd);
160:     PetscCheck(rd == (size_t)sb.st_size, PETSC_COMM_SELF, PETSC_ERR_FILE_OPEN, "Unable to read entire file: %s %d %d", filename, (int)rd, (int)sb.st_size);
161:     fclose(fd);
162:     body[blen + rd] = 0;
163:     PetscCall(PetscStrcat(body, "\r\n\r\n"
164:                                 "--foo_bar_baz\r\n"));
165:     PetscCall(PetscSSLInitializeContext(&ctx));
166:     PetscCall(PetscHTTPSConnect("www.googleapis.com", 443, ctx, &sock, &ssl));
167:     PetscCall(PetscHTTPSRequest("POST", "www.googleapis.com/upload/drive/v2/files/", head, "multipart/related; boundary=\"foo_bar_baz\"", body, ssl, buff, sizeof(buff)));
168:     PetscCall(PetscFree(body));
169:     PetscCall(PetscSSLDestroyContext(ctx));
170:     close(sock);
171:     PetscCall(PetscStrstr(buff, "\"title\"", &title));
172:     PetscCheck(title, PETSC_COMM_SELF, PETSC_ERR_LIB, "Upload of file %s failed", filename);
173:   }
174:   PetscFunctionReturn(PETSC_SUCCESS);
175: }

177: #if defined(PETSC_HAVE_UNISTD_H)
178:   #include <unistd.h>
179: #endif

181: /*@C
182:      PetscGoogleDriveAuthorize - Get authorization and refresh token for accessing Google drive from PETSc

184:    Not collective, only the first process in `MPI_Comm` does anything

186:    Input Parameters:
187: +  comm - the MPI communicator
188: -  tokensize - size of the token arrays

190:    Output Parameters:
191: +  access_token - can be used with `PetscGoogleDriveUpload()` for this one session
192: -  refresh_token - can be used for ever to obtain new access_tokens with `PetscGoogleDriveRefresh()`, guard this like a password
193:                    it gives access to your Google Drive

195:    Notes:
196:     This call requires stdout and stdin access from process 0 on the MPI communicator

198:    You can run src/sys/webclient/tutorials/googleobtainrefreshtoken to get a refresh token and then in the future pass it to
199:    PETSc programs with -google_refresh_token XXX

201:    Level: intermediate

203: .seealso: `PetscGoogleDriveRefresh()`, `PetscGoogleDriveUpload()`, `PetscURLShorten()`
204: @*/
205: PetscErrorCode PetscGoogleDriveAuthorize(MPI_Comm comm, char access_token[], char refresh_token[], size_t tokensize)
206: {
207:   SSL_CTX    *ctx;
208:   SSL        *ssl;
209:   int         sock;
210:   char        buff[8 * 1024], *ptr, body[1024];
211:   PetscMPIInt rank;
212:   size_t      len;
213:   PetscBool   found;

215:   PetscFunctionBegin;
216:   PetscCallMPI(MPI_Comm_rank(comm, &rank));
217:   if (rank == 0) {
218:     PetscCheck(isatty(fileno(PETSC_STDOUT)), PETSC_COMM_SELF, PETSC_ERR_USER, "Requires users input/output");
219:     PetscCall(PetscPrintf(comm, "Cut and paste the following into your browser:\n\n"
220:                                 "https://accounts.google.com/o/oauth2/auth?"
221:                                 "scope=https%%3A%%2F%%2Fwww.googleapis.com%%2Fauth%%2Fdrive.file&"
222:                                 "redirect_uri=urn:ietf:wg:oauth:2.0:oob&"
223:                                 "response_type=code&"
224:                                 "client_id=" PETSC_GOOGLE_CLIENT_ID "\n\n"));
225:     PetscCall(PetscPrintf(comm, "Paste the result here:"));
226:     ptr = fgets(buff, 1024, stdin);
227:     PetscCheck(ptr, PETSC_COMM_SELF, PETSC_ERR_FILE_READ, "Error reading from stdin: %d", errno);
228:     PetscCall(PetscStrlen(buff, &len));
229:     buff[len - 1] = 0; /* remove carriage return at end of line */

231:     PetscCall(PetscSSLInitializeContext(&ctx));
232:     PetscCall(PetscHTTPSConnect("accounts.google.com", 443, ctx, &sock, &ssl));
233:     PetscCall(PetscStrcpy(body, "code="));
234:     PetscCall(PetscStrcat(body, buff));
235:     PetscCall(PetscStrcat(body, "&client_id="));
236:     PetscCall(PetscStrcat(body, PETSC_GOOGLE_CLIENT_ID));
237:     PetscCall(PetscStrcat(body, "&client_secret="));
238:     PetscCall(PetscStrcat(body, PETSC_GOOGLE_CLIENT_ST));
239:     PetscCall(PetscStrcat(body, "&redirect_uri=urn:ietf:wg:oauth:2.0:oob&"));
240:     PetscCall(PetscStrcat(body, "grant_type=authorization_code"));

242:     PetscCall(PetscHTTPSRequest("POST", "accounts.google.com/o/oauth2/token", NULL, "application/x-www-form-urlencoded", body, ssl, buff, sizeof(buff)));
243:     PetscCall(PetscSSLDestroyContext(ctx));
244:     close(sock);

246:     PetscCall(PetscPullJSONValue(buff, "access_token", access_token, tokensize, &found));
247:     PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_LIB, "Google drive did not return access_token");
248:     PetscCall(PetscPullJSONValue(buff, "refresh_token", refresh_token, tokensize, &found));
249:     PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_LIB, "Google drive did not return refresh_token");

251:     PetscCall(PetscPrintf(comm, "Here is your Google refresh token, save it in a save place, in the future you can run PETSc\n"));
252:     PetscCall(PetscPrintf(comm, "programs with the option -google_refresh_token %s\n", refresh_token));
253:     PetscCall(PetscPrintf(comm, "to access Google Drive automatically\n"));
254:   }
255:   PetscFunctionReturn(PETSC_SUCCESS);
256: }

258: /*@C
259:      PetscURLShorten - Uses Google's service to get a short url for a long url

261:     Input Parameters:
262: +    url - long URL you want shortened
263: -    lenshorturl - length of buffer to contain short URL

265:     Output Parameter:
266: .    shorturl - the shortened URL

268:    Level: intermediate

270:    Note:
271:    Google no longer provides this service so this routine will no longer function

273: .seealso: `PetscGoogleDriveRefresh()`, `PetscGoogleDriveUpload()`, `PetscGoogleDriveAuthorize()`
274: @*/
275: PetscErrorCode PetscURLShorten(const char url[], char shorturl[], size_t lenshorturl)
276: {
277:   SSL_CTX  *ctx;
278:   SSL      *ssl;
279:   int       sock;
280:   char      buff[1024], body[512], post[1024];
281:   PetscBool found;

283:   PetscFunctionBegin;
284:   PetscCall(PetscSSLInitializeContext(&ctx));
285:   PetscCall(PetscHTTPSConnect("www.googleapis.com", 443, ctx, &sock, &ssl));
286:   PetscCall(PetscStrcpy(body, "{"));
287:   PetscCall(PetscPushJSONValue(body, "longUrl", url, sizeof(body) - 2));
288:   PetscCall(PetscStrcat(body, "}"));
289:   PetscCall(PetscSNPrintf(post, sizeof(post), "www.googleapis.com/urlshortener/v1/url?key=%s", PETSC_GOOGLE_API_KEY));
290:   PetscCall(PetscHTTPSRequest("POST", post, NULL, "application/json", body, ssl, buff, sizeof(buff)));
291:   PetscCall(PetscSSLDestroyContext(ctx));
292:   close(sock);

294:   PetscCall(PetscPullJSONValue(buff, "id", shorturl, lenshorturl, &found));
295:   PetscCheck(found, PETSC_COMM_SELF, PETSC_ERR_LIB, "Google drive did not return short URL");
296:   PetscFunctionReturn(PETSC_SUCCESS);
297: }