"Search by address, Block number/hash, transaction ID" option in explorer doesn't work.

Question

The "Search by address, Block number/hash, transaction ID" option in multichain explorer causes the following error":

"A server error occurred. Please contact the administrator."

 

Comments

Are you able to review your web server's error logs to see what is reported there?

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Traceback (most recent call last):
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 85, in run
    self.result = application(self.environ, self.start_response)
  File "/root/multichain-explorer/Mce/abe.py", line 332, in __call__
    return redirect(page)
  File "/root/multichain-explorer/Mce/abe.py", line 4107, in redirect
    ('Content-Type', 'text/html')])
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 180, in start_response
    assert type(val) is StringType,"Header values must be strings"
AssertionError: Header values must be strings

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Thanks - we're looking into it.

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Any update on this? Now I'm getting this error even on the asset details page of certain assets.
http://localhost:2750/demochain/assetref/3047-267-5096

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What version of MultiChain are you running?  Do you know if this problem started with a certain version?  For the assets that are no longer show the asset details page correctly, is there anything common about those assets?

Answer 1

This should now be fixed in the latest version of the Explorer - please confirm if that's the case.

Comments

I got the latest version of multichain-explorer, cleared the database and launched the explorer. But still I'm getting the same error.

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Did you rerun the "python setup.py" command from the Explorer README file? If not you still might be running a compiled version of the old Python files.

Answer 2

@Cypher What version of Python are you running?  I can't reproduce this on 2.7.12.  I think this is environmental as users did not have problems before and this issue has only recently started appearing.  The built-in http server code has not changed.  Maybe there is an issue with 2.7.13 or some other libraries?

To help debug this, in Mce/abe.py add a "print page" above this bit of code, around line 273:

if abe.fix_path_info(env):
    abe.log.debug("fixed path_info")
    return redirect(page)

Comments

The python version on the server is 2.7.12.
I've added the line "print page" before the piece of code mentioned above. Now how to proceed?

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When I search by address I can observe the following in logs:

"GET /search?q=1MsPKec9zMcRu4qWnxr2NrNUvBV9By2qXZWvn8 HTTP/1.1" 301 0
Traceback (most recent call last):
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 86, in run
    self.finish_response()
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 128, in finish_response
    self.write(data)
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 204, in write
    assert type(data) is StringType,"write() argument must be string"
AssertionError: write() argument must be string
49.35.14.104 - - [29/Mar/2017 17:07:20] "GET /search?q=1MsPKec9zMcRu4qWnxr2NrNUvBV9By2qXZWvn8 HTTP/1.1" 500 59
Traceback (most recent call last):
  File "/usr/lib/python2.7/SocketServer.py", line 290, in _handle_request_noblock
    self.process_request(request, client_address)
  File "/usr/lib/python2.7/SocketServer.py", line 318, in process_request
    self.finish_request(request, client_address)
  File "/usr/lib/python2.7/SocketServer.py", line 331, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "/usr/lib/python2.7/SocketServer.py", line 652, in __init__
    self.handle()
  File "/usr/lib/python2.7/wsgiref/simple_server.py", line 131, in handle
    handler.run(self.server.get_app())
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 92, in run
    self.close()
  File "/usr/lib/python2.7/wsgiref/simple_server.py", line 33, in close
    self.status.split(' ',1)[0], self.bytes_sent
AttributeError: 'NoneType' object has no attribute 'split'