kroo · June 26, 2017 18:11 · tonyknight · May 3, 2014 · tonyknight · May 3, 2014
diff --git a/README.md b/README.md
diff --git a/fix_growlvoice.js b/fix_growlvoice.js
 /**
 * A quick n' dirty hack to fix a dying GrowlVoice
 *
 * GrowlVoice is now officially dead: https://twitter.com/GrowlVoice/status/455931023868448768
 * However, Google didn't really shut off API access (there wasn't really any to begin with);
 * they slightly mangled a JSON object GrowlVoice was looking for on one of Google Voice's
 * internal pages.
 *
 * The following is a Cycript script that will bring a dead GrowlVoice back
 * to life for the moment (until Google decides to mangle things more).
 *
 * To use:
 *
 *  - Download cycript from cycript.org, and extract somewhere sane
 *  - download this script to the same place as cycript
 *  - Start GrowlVoice (it will complain about malformed JSON)
 *  - Run sudo ./cycript -p GrowlVoice fix_growlvoice.js
 */

 @import com.saurik.substrate.MS

 var oldm = {},
    NSUTF8StringEncoding = 4,
    MESSAGE = @selector(accountInfoFetcher:finishedWithData:error:),
    START_TOKEN = 'var _gcData = ',
    END_TOKEN = '};';

 // It's failing in accountInfoFetcher:finishedWithData:error:, a callback method
 // that parses a response from Google's auth page, and pulls in a bunch of info.
 //
 // Since it's failing there, let's hook it, and massage the data we're getting
 // back until GrowlVoice can understand it again.
 //
 // Using MobileSubstrate, the following line 'swizzles' the method, replacing 
 // it with our own wrapper function:
 MS.hookMessage(GoogleVoiceLoginInterface, MESSAGE, function (fetcher, data, err) {
  // In particular, we need to find a json object embedded in the page that was
  // just returned into this function (as the second arg, data).
  
  // Convert to NSString from NSData
  var sdata = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

  // Find the start and end of the JSON object, then split the page into 3
  // sections: before the json object, after, and the object itself. This is 
  // pretty fragile, but exactly what GrowlVoice does, so we might as well be 
  // consistant.
  var startIndex = sdata.indexOf(START_TOKEN) + START_TOKEN.length;
  var endIndex = sdata.indexOf(END_TOKEN, startIndex) + 1;
  var prefix = sdata.slice(0, startIndex);
  var suffix = sdata.slice(endIndex);
  var authJSON = sdata.slice(startIndex, endIndex);
  
  // Now, fix the JSON object.  This method is robust, but dangerous:
  // Google's new JSON encoding format only works when evaluating as a
  // javascript statement -- it's really not even close to valid json.
  // Therefore, we evaluate that line as a javascript statement, then
  // re-encode back to well-formed json.
  eval('var gcData = ' + authJSON);
  var fixedJSON = JSON.stringify(gcData);
  
  // reconstruct the original page, and pass back through to the original method
  var newdata = [(prefix + fixedJSON + suffix) dataUsingEncoding:NSUTF8StringEncoding];
  oldm->call(this, fetcher, newdata, err);
 }, oldm);

 // trigger the signin process again
 [choose(GoogleVoiceLoginInterface)[0] signIn];
	/**
	* A quick n' dirty hack to fix a dying GrowlVoice
	*
	* GrowlVoice is now officially dead: https://twitter.com/GrowlVoice/status/455931023868448768
	* However, Google didn't really shut off API access (there wasn't really any to begin with);
	* they slightly mangled a JSON object GrowlVoice was looking for on one of Google Voice's
	* internal pages.
	*
	* The following is a Cycript script that will bring a dead GrowlVoice back
	* to life for the moment (until Google decides to mangle things more).
	*
	* To use:
	*
	* - Download cycript from cycript.org, and extract somewhere sane
	* - download this script to the same place as cycript
	* - Start GrowlVoice (it will complain about malformed JSON)
	* - Run sudo ./cycript -p GrowlVoice fix_growlvoice.js
	*/

	@import com.saurik.substrate.MS

	var oldm = {},
	NSUTF8StringEncoding = 4,
	MESSAGE = @selector(accountInfoFetcher:finishedWithData:error:),
	START_TOKEN = 'var _gcData = ',
	END_TOKEN = '};';

	// It's failing in accountInfoFetcher:finishedWithData:error:, a callback method
	// that parses a response from Google's auth page, and pulls in a bunch of info.
	//
	// Since it's failing there, let's hook it, and massage the data we're getting
	// back until GrowlVoice can understand it again.
	//
	// Using MobileSubstrate, the following line 'swizzles' the method, replacing
	// it with our own wrapper function:
	MS.hookMessage(GoogleVoiceLoginInterface, MESSAGE, function (fetcher, data, err) {
	// In particular, we need to find a json object embedded in the page that was
	// just returned into this function (as the second arg, data).

	// Convert to NSString from NSData
	var sdata = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];

	// Find the start and end of the JSON object, then split the page into 3
	// sections: before the json object, after, and the object itself. This is
	// pretty fragile, but exactly what GrowlVoice does, so we might as well be
	// consistant.
	var startIndex = sdata.indexOf(START_TOKEN) + START_TOKEN.length;
	var endIndex = sdata.indexOf(END_TOKEN, startIndex) + 1;
	var prefix = sdata.slice(0, startIndex);
	var suffix = sdata.slice(endIndex);
	var authJSON = sdata.slice(startIndex, endIndex);

	// Now, fix the JSON object. This method is robust, but dangerous:
	// Google's new JSON encoding format only works when evaluating as a
	// javascript statement -- it's really not even close to valid json.
	// Therefore, we evaluate that line as a javascript statement, then
	// re-encode back to well-formed json.
	eval('var gcData = ' + authJSON);
	var fixedJSON = JSON.stringify(gcData);

	// reconstruct the original page, and pass back through to the original method
	var newdata = [(prefix + fixedJSON + suffix) dataUsingEncoding:NSUTF8StringEncoding];
	oldm->call(this, fetcher, newdata, err);
	}, oldm);

	// trigger the signin process again
	[choose(GoogleVoiceLoginInterface)[0] signIn];