Parse Error HPE_INVALID_CONSTANT when using proxy

[lacco]

I am using a proxy to fetch different URLs, but Youtube URLs are constantly failing with { [Error: Parse Error] bytesParsed: 984, code: 'HPE_INVALID_CONSTANT' }. When fetching the URL without proxy, everything is working fine, but with the proxy I get the mentioned error.

This is the code I use to fetch it:

request = Meteor.npmRequire("request").defaults({jar: true, maxRedirects: 30, timeout: 30000, strictSSL: false})

r = request({
  url: "https://youtu.be/YwTwrx1MTE4",
  proxy: "http://myproxy.com" # everything is working fine when deleting this line...
}, (error, response, body) ->
  console.log(error)
  # => { [Error: Parse Error] bytesParsed: 984, code: 'HPE_INVALID_CONSTANT' }
  console.log(r.response.headers)
)

These are the headers of the successful response without the proxy:

{
  "accept-ranges": "none",
  "alternate-protocol": "443:quic,p=1",
  "cache-control": "no-cache",
  "content-type": "text/html; charset=utf-8",
  "date": "Fri, 31 Jul 2015 06:33:37 GMT",
  "expires": "Tue, 27 Apr 1971 19:44:06 EST",
  "p3p": "CP=\"This is not a P3P policy! See http://support.google.com/accounts/answer/151657?hl=de for more info.\"",
  "server": "gwiseguy/2.0",
  "set-cookie": [
    "VISITOR_INFO1_LIVE=PfExje12ZXg; path=/; domain=.youtube.com; expires=Wed, 30-Mar-2016 18:26:37 GMT; httponly",
    "PREF=f1=50000000; path=/; domain=.youtube.com; expires=Wed, 30-Mar-2016 18:26:37 GMT",
    "YSC=_uKF2sbupGg; path=/; domain=.youtube.com; httponly"
  ],
  "transfer-encoding": "chunked",
  "vary": "Accept-Encoding",
  "x-content-type-options": "nosniff",
  "x-frame-options": "SAMEORIGIN",
  "x-xss-protection": "1; mode=block; report=https://www.google.com/appserve/security-bugs/log/youtube"
}

And these are the headers of the failing response when using the proxy:

{
  "accept-ranges": "none",
  "alternate-protocol": "443:quic,p=1",
  "cache-control": "no-cache",
  "connection": "close",
  "content-type": "text/html; charset=utf-8",
  "date": "Fri, 31 Jul 2015 06:33:02 GMT",
  "expires": "Tue, 27 Apr 1971 19:44:06 EST",
  "p3p": "CP=\"This is not a P3P policy! See http://support.google.com/accounts/answer/151657?hl=en for more info.\"",
  "proxy-connection": "close",
  "server": "gwiseguy/2.0",
  "set-cookie": [
    "YSC=7uyKX90bszI; path=/; domain=.youtube.com; httponly",
    "VISITOR_INFO1_LIVE=bq4DFwx9M5g; path=/; domain=.youtube.com; expires=Wed, 30-Mar-2016 18:26:02 GMT; httponly"
  ],
  "transfer-encoding": "chunked",
  "vary": "Accept-Encoding",
  "x-content-type-options": "nosniff",
  "x-crawlera-slave": "107.161.85.68:80",
  "x-crawlera-version": "1.4.2",
  "x-frame-options": "SAMEORIGIN",
  "x-xss-protection": "1; mode=block; report=https://www.google.com/appserve/security-bugs/log/youtube"
}

Any ideas what I can do?

[plato-cambrian]

Where did you get the headers for the unsuccessful response?
edit Some extra context here: nodejs/node-v0.x-archive#4863 it might be a bad content-length header on youtube's response to the proxy server or the proxy's response to you

[lacco]

@plato-cambrian Getting the response headers are a bit tricky, I updated my initial post. The trick is to save the request object in a variable and then access it in the callback.

[simov]

@lacco is your proxy server a valid HTTP one? I'm not getting HPE_INVALID_CONSTANT error when using proxy.

[simov]

See #1713 for more details.

[lacco]

Just for documentation purposes: It turned out that the proxy service I am using was sending incorrect HTML headers, it is working now for me...

[twigs67]

@lacco, how did you get this working? Can you share an example?

[elsaaeid]

it's same of the error which happened with me but when connecting mySql by server nodeJs and express .
the error is ( Proxy error: Could not proxy request /favicon.ico from localhost:3000 to http://localhost:3306/.
See https://nodejs.org/api/errors.html#errors_common_system_errors for more information (HPE_INVALID_CONSTANT) .)