[Share Code] Implemented x-callback-url

[silverjam]

When trying to use this recipe and consequently swizzle.py I'm seeing the follow error:

Traceback (most recent call last):
  File "_ctypes/callbacks.c", line 234, in 'calling callback function'
  File "/private/var/mobile/Containers/Shared/AppGroup/74CC34ED-493E-431F-9C45-5BD2EF3B2AE0/Pythonista3/Documents/firebaseapp/swizzle.py", line 146, in saveData
  File "/var/containers/Bundle/Application/71C9338F-1BD7-4D52-9DAD-EE24DDF5139E/Pythonista3.app/Frameworks/Py3Kit.framework/pylib/site-packages/objc_util.py", line 796, in __call__
    method_name, kwarg_order = resolve_instance_method(obj, self.name, args, kwargs)
  File "/var/containers/Bundle/Application/71C9338F-1BD7-4D52-9DAD-EE24DDF5139E/Pythonista3.app/Frameworks/Py3Kit.framework/pylib/site-packages/objc_util.py", line 403, in resolve_instance_method
    raise AttributeError('No method found for %s' % (name,))
AttributeError: No method found for originalsaveData

Any ideas how I can debug this?

[JonB]

I posted a github comment -- basically the code was swizzling a subclass's method, but then is passed an instance of the parent class, which does not have the original method. Swizzling the parent class (somewhat manual in this case) resolves the issue

[eddo888]

was wanting to let you know that x_callback_url is no longer working with the most recent pythonista release woth python 3.6

[JonB]

In what way? Are you getting exceptions?

[eddo888]

the callout works, the callback comes back to pythonista
however the swizzled handler doesnt fire

[eddo888]

no exceptions are showing, and the print statements ive put into the callback dont get called indicating that the swizzel method is not getting called or has changed

[JonB]

When it comes back, is the app still running? I.e anything you had printed to the console is still there?

[JonB]

I see that API is depreciated, so likely needs to be updated to use application:openURL:options: instead.

[eddo888]

ended up using
openPythonistaURL:
instead of
application:openURL:sourceApplication:annotation:

cheers D

[lukaskollmer]

@eddo888 what do you mean?
did you swizzle openPythonistaURL: instead of swizzling -[UIApplicationDelegate application:openURL:options:]?

[eddo888]

here is my uodated and sligjtly modified x_callback_url.py

# coding: utf-8
import swizzle
from objc_util import *
import sys, re, os, argparse
import ctypes, json, urllib, uuid, urllib
import webbrowser 

def argue():
    parser = argparse.ArgumentParser()

    parser.add_argument('-v', '--verbose',  action='store_true',  help='verbose mode')
    parser.add_argument('-t', '--test',    action='store_true',  help='run test')
    
    return parser.parse_args()

def params(data):
    if len(data) == 0:
        return ''
    p = '&'.join(
        map(
            lambda x: 
                '%s=%s'%(x,urllib.quote(data[x])),
            data.keys()
        )
    )
    return '?%s'%p

def reverse(url):
    query = NSURLComponents.componentsWithURL_resolvingAgainstBaseURL_(nsurl(url), False)
    parameters = dict()
    if query.queryItems() is not None:
        for queryItem in query.queryItems():
            parameters[str(queryItem.name())] = str(queryItem.value())
    return parameters

def open_url(url, handler):
    global _handler
    global _requestID
    _requestID = uuid.uuid1()
    _handler = handler
    x_success = urllib.quote('pythonista://?request=%s'%_requestID)
    url_with_uuid = url.replace('?','?x-success=%s&'%x_success)
    #sys.stderr.write('> %s\n'% url_with_uuid)
    webbrowser.open(url_with_uuid)

def openPythonistaURL_(_self, _sel, url):
    url_str = str(ObjCInstance(url))
    #sys.stderr.write('< %s\n'%url_str)
    global _call_me, _handler, _requestID

    if '?request=%s'%_requestID in url_str:
        url_str = url_str.replace('?request=%s&'%_requestID, '?')
        parameters = reverse(url_str)
        if _handler:
            _handler(parameters)
        return True
        
    elif _call_me in url_str:
        #print url_str
        parameters = reverse(url_str)
        x_parameters = dict()
        for x in [
            'x-source',
            'x-success',
            'x-error',
            'x-cancel',
            'x-script',
        ]:
            if x in parameters.keys():
                x_parameters[x] = parameters[x]
                del parameters[x]
        
        #print '%s\n%s'%(
        #    json.dumps(x_parameters),
        #    json.dumps(parameters)
        #)
        
        if 'x-script' not in x_parameters.keys():
            return
        
        try:
            import importlib
            mod = importlib.import_module(
                x_parameters['x-script']
            )
            res = str(mod.main(parameters))
            url=x_parameters['x-success']+'?args=%s'%urllib.quote(res)
        except:
            error=str(sys.exc_info()[0])
            url=x_parameters['x-error']+'?args=%s'%urllib.quote(error)
            
        #print url
        webbrowser.open(url)
        return True

    else:
        #print('original url=%s'%url_str)
        obj = ObjCInstance(_self)
        original_method = getattr(obj, 'original'+c.sel_getName(_sel), None)
        if original_method:
            _annotation = ObjCInstance(annotation) if annotation else None
            return original_method(
                ObjCInstance(app), 
                ObjCInstance(url), ObjCInstance(source_app), 
                _annotation
            )
        return

def test():
    data={
        'statement' : 'select * from MyTable'
    }
    
    url='generaldb://x-callback-url/execute-select-statement' + params(data)
    print url
        
    def myhandler(parameters):
        print parameters
        for row in parameters['rows'].split('\n'):
            print row
        return
    
    open_url(url,myhandler)
    
def setup():
    global NSURLComponents, _call_me, _handler, _requestID
    _call_me = 'pythonista://x-callback-url'
    _handler = None
    _requestID = None
    NSURLComponents = ObjCClass('NSURLComponents')
    appDelegate = UIApplication.sharedApplication().delegate()
    
    # Do the swizzling
    cls = ObjCInstance(c.object_getClass(appDelegate.ptr))
    swizzle.swizzle(
        cls, 
        'openPythonistaURL:', openPythonistaURL_
    )
    #print 'swizzled'
    return

def main():
    setup()
    args = argue()
    if args.test : test(); return
    print 'setup complete:'#, sys.argv
    #webbrowser.open('workflow://')
    return    

if __name__ == '__main__': main()

[lukaskollmer]

(fyi, you should wrap the code block with ```, to get proper syntax highlighting. reading the code w/out that is really difficult)

[eddo888]

cheers thought i was in confluence not markdown :-)

[ccc]

def params(data):
    '?' + urllib.urlencode(data)

https://docs.python.org/2/library/urllib.html#urllib.urlencode

[eddo888]

def params(data):
    if len(data) == 0:
        return ''
    p = '&'.join(
        map(
            lambda x: 
                '%s=%s'%(x,urllib.quote(data[x])),
            data.keys()
        )
    )
    print data
    print urllib.urlencode(data)
    print p
    
    return '?%s'%p

yields

{'statement': 'select * from MyTable'}
statement=select+%2A+from+MyTable
statement=select%20%2A%20from%20MyTable

the client receiving the params preferrs %20 to +

[dgelessus]

@eddo888 In Python 3 you can do that using the quote_via parameter, like urllib.parse.urlencode({...}, quote_via=urllib.parse.quote). However in Python 2 the quote_via parameter doesn't exist yet. You can manually replace every + with %20, like urllib.parse.urlencode({...}).replace("+", "%20"). This should produce the same result and is much shorter than building the whole parameter string by hand.

[eddo888]

Thanks for taking the time to respond and guide, I hope you have a fun weekend. Cheers Dave

[robertiii]

How do I use this and get arguments from workflow?

[dc2]

This awesome piece of code leads to the famous 404...

https://github.com/lukaskollmer/pythonista-scripts/blob/master/x-callback-url/x_callback_url.py

Someone stil has it available?

I'm trying to load a file from IAwriter to process it in phytonista...

[cvp]

@dc2 see here a lot of Pythonista scripts, centralized by tdamdouni