int main(int argc,char **argv)
{
PetscErrorCode ierr;
char access_token[512],refresh_token[512];
ierr = PetscInitialize(&argc,&argv,NULL,NULL);if (ierr) return ierr;
ierr = PetscGoogleDriveAuthorize(PETSC_COMM_WORLD,access_token,refresh_token,sizeof(access_token));CHKERRQ(ierr);
ierr = PetscPrintf(PETSC_COMM_WORLD,"Your Refresh token is %s\n",refresh_token);CHKERRQ(ierr);
ierr = PetscFinalize();
return ierr;
}
/*@C
PetscGoogleDriveRefresh - Get a new authorization token for accessing Google drive from PETSc from a refresh token
Not collective, only the first process in the MPI_Comm does anything
Input Parameters:
+ comm - MPI communicator
. refresh token - obtained with PetscGoogleDriveAuthorize(), if NULL PETSc will first look for one in the options data
if not found it will call PetscGoogleDriveAuthorize()
- tokensize - size of the output string access_token
Output Parameter:
. access_token - token that can be passed to PetscGoogleDriveUpload()
Options Database:
. -google_refresh_token XXX where XXX was obtained from PetscGoogleDriveAuthorize()
Level: intermediate
.seealso: PetscURLShorten(), PetscGoogleDriveAuthorize(), PetscGoogleDriveUpload()
@*/
PetscErrorCode PetscGoogleDriveRefresh(MPI_Comm comm,const char refresh_token[],char access_token[],size_t tokensize)
{
SSL_CTX *ctx;
SSL *ssl;
int sock;
PetscErrorCode ierr;
char buff[8*1024],body[1024];
PetscMPIInt rank;
char *refreshtoken = (char*)refresh_token;
PetscBool found;
PetscFunctionBegin;
ierr = MPI_Comm_rank(comm,&rank);CHKERRQ(ierr);
if (!rank) {
if (!refresh_token) {
PetscBool set;
ierr = PetscMalloc1(512,&refreshtoken);CHKERRQ(ierr);
ierr = PetscOptionsGetString(NULL,NULL,"-google_refresh_token",refreshtoken,512,&set);CHKERRQ(ierr);
if (!set) {
ierr = PetscGoogleDriveAuthorize(comm,access_token,refreshtoken,512*sizeof(char));CHKERRQ(ierr);
ierr = PetscFree(refreshtoken);CHKERRQ(ierr);
PetscFunctionReturn(0);
}
}
ierr = PetscSSLInitializeContext(&ctx);CHKERRQ(ierr);
ierr = PetscHTTPSConnect("accounts.google.com",443,ctx,&sock,&ssl);CHKERRQ(ierr);
ierr = PetscStrcpy(body,"client_id=");CHKERRQ(ierr);
ierr = PetscStrcat(body,PETSC_GOOGLE_CLIENT_ID);CHKERRQ(ierr);
ierr = PetscStrcat(body,"&client_secret=");CHKERRQ(ierr);
ierr = PetscStrcat(body,PETSC_GOOGLE_CLIENT_ST);CHKERRQ(ierr);
ierr = PetscStrcat(body,"&refresh_token=");CHKERRQ(ierr);
ierr = PetscStrcat(body,refreshtoken);CHKERRQ(ierr);
if (!refresh_token) {ierr = PetscFree(refreshtoken);CHKERRQ(ierr);}
ierr = PetscStrcat(body,"&grant_type=refresh_token");CHKERRQ(ierr);
ierr = PetscHTTPSRequest("POST","accounts.google.com/o/oauth2/token",NULL,"application/x-www-form-urlencoded",body,ssl,buff,sizeof(buff));CHKERRQ(ierr);
ierr = PetscSSLDestroyContext(ctx);CHKERRQ(ierr);
close(sock);
ierr = PetscPullJSONValue(buff,"access_token",access_token,tokensize,&found);CHKERRQ(ierr);
if (!found) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_LIB,"Google drive did not return access_token");
}
PetscFunctionReturn(0);
}