Actual source code: google.c

petsc-main 2021-04-20
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  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"


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

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

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

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

 32:    Options Database:
 33: .  -google_refresh_token XXX   where XXX was obtained from PetscGoogleDriveAuthorize()

 35:    Level: intermediate

 37: .seealso: PetscURLShorten(), PetscGoogleDriveAuthorize(), PetscGoogleDriveUpload()

 39: @*/
 40: PetscErrorCode PetscGoogleDriveRefresh(MPI_Comm comm,const char refresh_token[],char access_token[],size_t tokensize)
 41: {
 42:   SSL_CTX        *ctx;
 43:   SSL            *ssl;
 44:   int            sock;
 46:   char           buff[8*1024],body[1024];
 47:   PetscMPIInt    rank;
 48:   char           *refreshtoken = (char*)refresh_token;
 49:   PetscBool      found;

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

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

 79:     PetscPullJSONValue(buff,"access_token",access_token,tokensize,&found);
 80:     if (!found) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Google drive did not return access_token");
 81:   }
 82:   return(0);
 83: }

 85: #include <sys/stat.h>

 87: /*@C
 88:      PetscGoogleDriveUpload - Loads a file to the Google Drive

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

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

 97:   Options Database:
 98: .  -google_refresh_token   XXX

100:   Usage Patterns:
101:     With PETSc option -google_refresh_token  XXX given
102:     PetscGoogleDriveUpload(comm,NULL,filename);        will upload file with no user interaction

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

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

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

115:     PetscGoogleDriveAuthorize(comm,access_token,refresh_token,sizeof(access_token));
116:     PetscGoogleDriveUpload(comm,access_token,filename);

118:    Level: intermediate

120: .seealso: PetscURLShorten(), PetscGoogleDriveAuthorize(), PetscGoogleDriveRefresh()

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

137:   MPI_Comm_rank(comm,&rank);
138:   if (!rank) {
139:     PetscStrcpy(head,"Authorization: Bearer ");
140:     PetscStrcat(head,access_token);
141:     PetscStrcat(head,"\r\n");
142:     PetscStrcat(head,"uploadType: multipart\r\n");

144:     err = stat(filename,&sb);
145:     if (err) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to stat file: %s",filename);
146:     len = 1024 + sb.st_size;
147:     PetscMalloc1(len,&body);
148:     PetscStrcpy(body,"--foo_bar_baz\r\n"
149:                             "Content-Type: application/json\r\n\r\n"
150:                             "{");
151:     PetscPushJSONValue(body,"title",filename,len);
152:     PetscStrcat(body,",");
153:     PetscPushJSONValue(body,"mimeType","text.html",len);
154:     PetscStrcat(body,",");
155:     PetscPushJSONValue(body,"description","a file",len);
156:     PetscStrcat(body,"}\r\n\r\n"
157:                             "--foo_bar_baz\r\n"
158:                             "Content-Type: text/html\r\n\r\n");
159:     PetscStrlen(body,&blen);
160:     fd = fopen (filename, "r");
161:     if (!fd) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to open file: %s",filename);
162:     rd = fread (body+blen, sizeof (unsigned char), sb.st_size, fd);
163:     if (rd != (size_t) sb.st_size) SETERRQ3(PETSC_COMM_SELF,PETSC_ERR_FILE_OPEN,"Unable to read entire file: %s %d %d",filename,(int)rd,sb.st_size);
164:     fclose(fd);
165:     body[blen + rd] = 0;
166:     PetscStrcat(body,"\r\n\r\n"
167:                             "--foo_bar_baz\r\n");
168:     PetscSSLInitializeContext(&ctx);
169:     PetscHTTPSConnect("www.googleapis.com",443,ctx,&sock,&ssl);
170:     PetscHTTPSRequest("POST","www.googleapis.com/upload/drive/v2/files/",head,"multipart/related; boundary=\"foo_bar_baz\"",body,ssl,buff,sizeof(buff));
171:     PetscFree(body);
172:     PetscSSLDestroyContext(ctx);
173:     close(sock);
174:     PetscStrstr(buff,"\"title\"",&title);
175:     if (!title) SETERRQ1(PETSC_COMM_SELF,PETSC_ERR_LIB,"Upload of file %s failed",filename);
176:   }
177:   return(0);
178: }

180: #if defined(PETSC_HAVE_UNISTD_H)
181: #include <unistd.h>
182: #endif

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

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

189:    Input Parameters:
190: +  comm - the MPI communicator
191: -  tokensize - size of the token arrays

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

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

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

204:    Level: intermediate

206: .seealso: PetscGoogleDriveRefresh(), PetscGoogleDriveUpload(), PetscURLShorten()

208: @*/
209: PetscErrorCode PetscGoogleDriveAuthorize(MPI_Comm comm,char access_token[],char refresh_token[],size_t tokensize)
210: {
211:   SSL_CTX        *ctx;
212:   SSL            *ssl;
213:   int            sock;
215:   char           buff[8*1024],*ptr,body[1024];
216:   PetscMPIInt    rank;
217:   size_t         len;
218:   PetscBool      found;

221:   MPI_Comm_rank(comm,&rank);
222:   if (!rank) {
223:     if (!isatty(fileno(PETSC_STDOUT))) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_USER,"Requires users input/output");
224:     PetscPrintf(comm,"Cut and paste the following into your browser:\n\n"
225:                             "https://accounts.google.com/o/oauth2/auth?"
226:                             "scope=https%%3A%%2F%%2Fwww.googleapis.com%%2Fauth%%2Fdrive.file&"
227:                             "redirect_uri=urn:ietf:wg:oauth:2.0:oob&"
228:                             "response_type=code&"
229:                             "client_id="
230:                             PETSC_GOOGLE_CLIENT_ID
231:                             "\n\n");
232:     PetscPrintf(comm,"Paste the result here:");
233:     ptr  = fgets(buff, 1024, stdin);
234:     if (!ptr) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_FILE_READ, "Error reading from stdin: %d", errno);
235:     PetscStrlen(buff,&len);
236:     buff[len-1] = 0; /* remove carriage return at end of line */

238:     PetscSSLInitializeContext(&ctx);
239:     PetscHTTPSConnect("accounts.google.com",443,ctx,&sock,&ssl);
240:     PetscStrcpy(body,"code=");
241:     PetscStrcat(body,buff);
242:     PetscStrcat(body,"&client_id=");
243:     PetscStrcat(body,PETSC_GOOGLE_CLIENT_ID);
244:     PetscStrcat(body,"&client_secret=");
245:     PetscStrcat(body,PETSC_GOOGLE_CLIENT_ST);
246:     PetscStrcat(body,"&redirect_uri=urn:ietf:wg:oauth:2.0:oob&");
247:     PetscStrcat(body,"grant_type=authorization_code");

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

253:     PetscPullJSONValue(buff,"access_token",access_token,tokensize,&found);
254:     if (!found) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Google drive did not return access_token");
255:     PetscPullJSONValue(buff,"refresh_token",refresh_token,tokensize,&found);
256:     if (!found) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Google drive did not return refresh_token");

258:     PetscPrintf(comm,"Here is your Google refresh token, save it in a save place, in the future you can run PETSc\n");
259:     PetscPrintf(comm,"programs with the option -google_refresh_token %s\n",refresh_token);
260:     PetscPrintf(comm,"to access Google Drive automatically\n");
261:   }
262:   return(0);
263: }


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

269:     Input Parameters:
270: +    url - long URL you want shortened
271: -    lenshorturl - length of buffer to contain short URL

273:     Output Parameter:
274: .    shorturl - the shortened URL

276:    Level: intermediate

278: .seealso: PetscGoogleDriveRefresh(), PetscGoogleDriveUpload(), PetscGoogleDriveAuthorize()
279: @*/
280: PetscErrorCode PetscURLShorten(const char url[],char shorturl[],size_t lenshorturl)
281: {
282:   SSL_CTX        *ctx;
283:   SSL            *ssl;
284:   int            sock;
286:   char           buff[1024],body[512],post[1024];
287:   PetscBool      found;

290:   PetscSSLInitializeContext(&ctx);
291:   PetscHTTPSConnect("www.googleapis.com",443,ctx,&sock,&ssl);
292:   PetscStrcpy(body,"{");
293:   PetscPushJSONValue(body,"longUrl",url,sizeof(body)-2);
294:   PetscStrcat(body,"}");
295:   PetscSNPrintf(post,sizeof(post),"www.googleapis.com/urlshortener/v1/url?key=%s",PETSC_GOOGLE_API_KEY);
296:   PetscHTTPSRequest("POST",post,NULL,"application/json",body,ssl,buff,sizeof(buff));
297:   PetscSSLDestroyContext(ctx);
298:   close(sock);

300:   PetscPullJSONValue(buff,"id",shorturl,lenshorturl,&found);
301:   if (!found) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Google drive did not return short URL");
302:   return(0);
303: }