Re: Httpclient and hangs

[euant]

First point, why does your proc return a string, when no result is actually set?

Second, why does it request the content twice, but only use it once?

I'd rewrite your proc as follows:
    
    
    import httpclient, asyncdispatch, strutils
    
    const
      MAX_REDIRECTS = 5
      TIMEOUT = 2000
    
    proc getPage*(client: HttpClient | AsyncHttpClient, host: string): 
Future[void] {.multisync.} =
      let url = "http://"; & host
      
      try:
        echo "HTTP/S Probe: ", host
        
        let content = await client.getContent(url)
        
        for line in content.splitLines():
          if "Invalid URL" in line:
            echo "Invalid URL \n"
          elif "IIS7" in line:
            echo "Found IIS Portal \n"
          elif "bitnami-xampp" in line:
            echo "Default XAMPP Server \n"
          elif "Bad Request" in line:
            red("[-]Bad Request \n")
          elif "Bluehost.Com" in line:
            echo "Default Blue Host Server \n"
          else:
            red("[~]Check Manually\n")
            errorHandler(3, host)
            break
      except:
        errorHandler(2, host)
    
    when isMainModule:
      let client = newHttpClient(maxRedirects = MAX_REDIRECTS, timeout = 
TIMEOUT)
      
      getPage(client, "google.com")
    
    
    Run

Looking at your code, you seem to be looping indefinitely testing several 
hosts. Ideally, you should create one HTTP client instance and re-use it for 
every loop iteration, which is why the above code passes the client in.

I also made the above function take either an async or sync http client, 
leaving you the option to use an asynchronous version at a later date - as you 
seem to be trying to scan a bunch of random IP addresses, you could probably do 
a few at a time with an async version.