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Overview
Comment:Several minor internal cleanups to the json code which i thought i had committed last week :/.
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SHA1: 055dfb1223c42a2d89e388f5cf9d42c3b9f1c044
User & Date: stephan 2012-07-13 15:06:56
Context
2012-07-13
16:56
Fixed a segfault which could/did happen when running content through wikification in CLI mode (which g.zTop is not set). (check-in: a3dd2cfe user: stephan tags: trunk)
15:06
Several minor internal cleanups to the json code which i thought i had committed last week :/. (check-in: 055dfb12 user: stephan tags: trunk)
2012-07-06
16:18
/json/query now fails without executing the query if the provided query has no result _columns_ (to explicitly disallow INSERT/DELETE/DROP, etc.). (check-in: 3e1dd97f user: stephan tags: trunk)
Changes
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Changes to src/json.c. 

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    if(!a){
      a = cson_new_array();
      assert(NULL!=a);
    }
    if(!colNames){
      colNamesV = cson_sqlite3_column_names(pStmt->pStmt);
      assert(NULL != colNamesV);
      cson_value_add_reference(colNamesV)/*avoids an ownership problem*/;
      colNames = cson_value_get_array(colNamesV);
      assert(NULL != colNames);
    }      
    row = cson_sqlite3_row_to_object2(pStmt->pStmt, colNames);
    if(!row && !warnMsg){
      warnMsg = "Could not convert at least one result row to JSON.";
      continue;
    }
    if( 0 != cson_array_append(a, row) ){
      cson_value_free(row);
      assert( 0 && "Alloc error.");
      if(pTgt != a) {
        cson_free_array(a);
      }

      return NULL;
    }
  }
  cson_value_free(colNamesV);
  if(warnMsg){
    json_warn( FSL_JSON_W_ROW_TO_JSON_FAILED, warnMsg );
  }








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    if(!a){
      a = cson_new_array();
      assert(NULL!=a);
    }
    if(!colNames){
      colNamesV = cson_sqlite3_column_names(pStmt->pStmt);
      assert(NULL != colNamesV);
      /*Why? cson_value_add_reference(colNamesV) avoids an ownership problem*/;
      colNames = cson_value_get_array(colNamesV);
      assert(NULL != colNames);
    }      
    row = cson_sqlite3_row_to_object2(pStmt->pStmt, colNames);
    if(!row && !warnMsg){
      warnMsg = "Could not convert at least one result row to JSON.";
      continue;
    }
    if( 0 != cson_array_append(a, row) ){
      cson_value_free(row);

      if(pTgt != a) {
        cson_free_array(a);
      }
      assert( 0 && "Alloc error.");
      return NULL;
    }
  }
  cson_value_free(colNamesV);
  if(warnMsg){
    json_warn( FSL_JSON_W_ROW_TO_JSON_FAILED, warnMsg );
  }

Changes to src/json_detail.h. 

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  ** Which mode(s) of execution does func() support:
  **
  ** <0 = CLI only, >0 = HTTP only, 0==both
  **
  ** Now that we can simulate POST in CLI mode, the distinction
  ** between them has disappeared in most (or all) cases, so 0 is the
  ** the standard value.



  */
  char runMode;
} JsonPageDef;

/*
** Holds common keys used for various JSON API properties.
*/
................................................................................
** values and NULL is returned. If non-NULL is returned, ownership is
** transfered to the caller (but the g.json error state might still be
** set in that case, so the caller must check that or pass it on up
** the dispatch chain).
*/
cson_value * json_page_dispatch_helper(JsonPageDef const * pages);

/*
** Implements the /json/wiki family of pages/commands.
**
*/
cson_value * json_page_wiki();

/*
** Implements /json/timeline/wiki and /json/wiki/timeline.
*/
cson_value * json_timeline_wiki();

/*
** Implements /json/timeline family of functions.
*/
cson_value * json_page_timeline();

/*
** Convenience wrapper around cson_value_new_string().
** Returns NULL if str is NULL or on allocation error.
*/
cson_value * json_new_string( char const * str );

/*








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  ** Which mode(s) of execution does func() support:
  **
  ** <0 = CLI only, >0 = HTTP only, 0==both
  **
  ** Now that we can simulate POST in CLI mode, the distinction
  ** between them has disappeared in most (or all) cases, so 0 is the
  ** the standard value.
  **
  ** 201207: this is not needed any more. We can get rid of it. Or
  ** keep it around in case it becomes useful again at some point.
  */
  char runMode;
} JsonPageDef;

/*
** Holds common keys used for various JSON API properties.
*/
................................................................................
** values and NULL is returned. If non-NULL is returned, ownership is
** transfered to the caller (but the g.json error state might still be
** set in that case, so the caller must check that or pass it on up
** the dispatch chain).
*/
cson_value * json_page_dispatch_helper(JsonPageDef const * pages);

















/*
** Convenience wrapper around cson_value_new_string().
** Returns NULL if str is NULL or on allocation error.
*/
cson_value * json_new_string( char const * str );

/*

Changes to src/json_report.c. 

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*/
cson_value * json_page_report(){
  if(!g.perm.RdTkt && !g.perm.NewTkt ){
    json_set_err(FSL_JSON_E_DENIED,
                 "Requires 'r' or 'n' permissions.");
    return NULL;
  }
  return json_page_dispatch_helper(&JsonPageDefs_Report[0]);
}

/*
** Searches the environment for a "report" parameter
** (CLI: -report/-r #).
**
** If one is not found and argPos is >0 then json_command_arg()
................................................................................

  goto end;

  error:
  assert(0 != g.json.resultCode);
  cson_value_free( cson_object_value(pay) );
  pay = NULL;
    end:

  return pay ? cson_object_value(pay) : NULL;

}

static cson_value * json_report_save(){
  return NULL;
}
#endif /* FOSSIL_ENABLE_JSON */








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*/
cson_value * json_page_report(){
  if(!g.perm.RdTkt && !g.perm.NewTkt ){
    json_set_err(FSL_JSON_E_DENIED,
                 "Requires 'r' or 'n' permissions.");
    return NULL;
  }
  return json_page_dispatch_helper(JsonPageDefs_Report);
}

/*
** Searches the environment for a "report" parameter
** (CLI: -report/-r #).
**
** If one is not found and argPos is >0 then json_command_arg()
................................................................................

  goto end;

  error:
  assert(0 != g.json.resultCode);
  cson_value_free( cson_object_value(pay) );
  pay = NULL;
  end:

  return pay ? cson_object_value(pay) : NULL;

}

static cson_value * json_report_save(){
  return NULL;
}
#endif /* FOSSIL_ENABLE_JSON */

Changes to src/json_user.c. 

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  puts(blob_str(&sql));
  cson_output_FILE( cson_object_value(pUser), stdout, NULL );
#endif
  db_prepare(&q, "%s", blob_str(&sql));
  db_exec(&q);
  db_finalize(&q);
#if TRY_LOGIN_GROUP
  if( zPW || forceLogout ){
    Blob groupSql = empty_blob;
    char * zErr = NULL;
    blob_appendf(&groupSql,
      "INSERT INTO user(login)"
      "  SELECT %Q WHERE NOT EXISTS(SELECT 1 FROM user WHERE login=%Q);",
      zName, zName
    );
................................................................................
     a JSON form of it... */
  cson_object * u = cson_new_object();
  char const * str = NULL;
  char b = -1;
  int i = -1;
  int uid = -1;
  cson_value * payload = NULL;

#define PROP(LK,SK) str = json_find_option_cstr(LK,NULL,SK);     \
  if(str){ cson_object_set(u, LK, json_new_string(str)); } (void)0
  PROP("name","n");
  PROP("password","p");
  PROP("info","i");
  PROP("capabilities","c");
#undef PROP

#define PROP(LK,DFLT) b = json_find_option_bool(LK,NULL,NULL,DFLT);     \
  if(DFLT!=b){ cson_object_set(u, LK, cson_value_new_bool(b)); } (void)0
  PROP("forceLogout",-1);
#undef PROP

#define PROP(LK,DFLT) i = json_find_option_int(LK,NULL,NULL,DFLT);   \
  if(DFLT != i){ cson_object_set(u, LK, cson_value_new_integer(i)); } (void)0








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  puts(blob_str(&sql));
  cson_output_FILE( cson_object_value(pUser), stdout, NULL );
#endif
  db_prepare(&q, "%s", blob_str(&sql));
  db_exec(&q);
  db_finalize(&q);
#if TRY_LOGIN_GROUP
  if( zPW || cson_value_get_bool(forceLogout) ){
    Blob groupSql = empty_blob;
    char * zErr = NULL;
    blob_appendf(&groupSql,
      "INSERT INTO user(login)"
      "  SELECT %Q WHERE NOT EXISTS(SELECT 1 FROM user WHERE login=%Q);",
      zName, zName
    );
................................................................................
     a JSON form of it... */
  cson_object * u = cson_new_object();
  char const * str = NULL;
  char b = -1;
  int i = -1;
  int uid = -1;
  cson_value * payload = NULL;
  /* String properties... */
#define PROP(LK,SK) str = json_find_option_cstr(LK,NULL,SK);     \
  if(str){ cson_object_set(u, LK, json_new_string(str)); } (void)0
  PROP("name","n");
  PROP("password","p");
  PROP("info","i");
  PROP("capabilities","c");
#undef PROP
  /* Boolean properties... */
#define PROP(LK,DFLT) b = json_find_option_bool(LK,NULL,NULL,DFLT);     \
  if(DFLT!=b){ cson_object_set(u, LK, cson_value_new_bool(b)); } (void)0
  PROP("forceLogout",-1);
#undef PROP

#define PROP(LK,DFLT) i = json_find_option_int(LK,NULL,NULL,DFLT);   \
  if(DFLT != i){ cson_object_set(u, LK, cson_value_new_integer(i)); } (void)0

Changes to src/json_wiki.c. 

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#ifdef FOSSIL_ENABLE_JSON
/*
** Copyright (c) 2011 D. Richard Hipp
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of the Simplified BSD License (also
** known as the "2-Clause License" or "FreeBSD License".)
**
** This program is distributed in the hope that it will be useful,
** but without any warranty; without even the implied warranty of
................................................................................


/*
** Implements the /json/wiki family of pages/commands.
**
*/
cson_value * json_page_wiki(){
  return json_page_dispatch_helper(&JsonPageDefs_Wiki[0]);
}






char * json_wiki_get_uuid_for_rid( int rid )
{
  return db_text(NULL,
             "SELECT b.uuid FROM tag t, tagxref x, blob b"
             " WHERE x.tagid=t.tagid AND t.tagname GLOB 'wiki-*' "
             " AND b.rid=x.rid AND b.rid=%d"
             " ORDER BY x.mtime DESC LIMIT 1",
................................................................................
  Manifest * pWiki = NULL;
  if( NULL == (pWiki = manifest_get(rid, CFTYPE_WIKI)) ){
    json_set_err( FSL_JSON_E_UNKNOWN,
                  "Error reading wiki page from manifest (rid=%d).",
                  rid );
    return NULL;
  }else{
    /*char const * zFormat = NULL;*/
    unsigned int len = 0;
    cson_object * pay = cson_new_object();
    char const * zBody = pWiki->zWiki;
    char const * zFormat = NULL;
    char * zUuid = json_wiki_get_uuid_for_rid(rid);
    cson_object_set(pay,"name",json_new_string(pWiki->zWikiTitle));
    cson_object_set(pay,"uuid",json_new_string(zUuid));



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#ifdef FOSSIL_ENABLE_JSON
/*
** Copyright (c) 2011-12 D. Richard Hipp
**
** This program is free software; you can redistribute it and/or
** modify it under the terms of the Simplified BSD License (also
** known as the "2-Clause License" or "FreeBSD License".)
**
** This program is distributed in the hope that it will be useful,
** but without any warranty; without even the implied warranty of
................................................................................


/*
** Implements the /json/wiki family of pages/commands.
**
*/
cson_value * json_page_wiki(){
  return json_page_dispatch_helper(JsonPageDefs_Wiki);
}

/*
** Returns the UUID for the given wiki blob RID, or NULL if not
** found. The returned string is allocated via db_text() and must be
** free()d by the caller.
*/
char * json_wiki_get_uuid_for_rid( int rid )
{
  return db_text(NULL,
             "SELECT b.uuid FROM tag t, tagxref x, blob b"
             " WHERE x.tagid=t.tagid AND t.tagname GLOB 'wiki-*' "
             " AND b.rid=x.rid AND b.rid=%d"
             " ORDER BY x.mtime DESC LIMIT 1",
................................................................................
  Manifest * pWiki = NULL;
  if( NULL == (pWiki = manifest_get(rid, CFTYPE_WIKI)) ){
    json_set_err( FSL_JSON_E_UNKNOWN,
                  "Error reading wiki page from manifest (rid=%d).",
                  rid );
    return NULL;
  }else{

    unsigned int len = 0;
    cson_object * pay = cson_new_object();
    char const * zBody = pWiki->zWiki;
    char const * zFormat = NULL;
    char * zUuid = json_wiki_get_uuid_for_rid(rid);
    cson_object_set(pay,"name",json_new_string(pWiki->zWikiTitle));
    cson_object_set(pay,"uuid",json_new_string(zUuid));

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