HTTP Protocol

The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, hypermedia information systems. Hypertext is structured text that uses logical links (hyperlinks) between nodes containing text. HTTP is the protocol to exchange or transfer hypertext. HTTP functions as a request-response protocol in the client-server computing model. HTTP is designed to permit intermediate network elements to improve or enable communications between clients and servers. HTTP is an application layer protocol designed within the framework of the Internet Protocol Suite; it presumes an underlying and reliable transport layer protocol.

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I currently have a HttpWebRequest wcustom header written in VB.net defined as:

Dim request As HttpWebRequest = CType(WebRequest.Create(url), HttpWebRequest)
            request.Method = "POST"
            request.Headers.Add("X-SessionID", sessionID)
            request.ContentType = "application/json; charset=utf-8"

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I need to add in the content as below created using PHP/JS.

$options = array(
  'http' =>
  array (
    'method'        => 'POST',
    'header'        => 'X-SessionID: ' . $MY_SESSION_ID . "\r\n" .
                       'Content-Type: application/json',
    'content'       => json_encode($mylist1),
    'ignore_errors'  => true,
  )
);

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How do I do this?
0
Become a CompTIA Certified Healthcare IT Tech
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Become a CompTIA Certified Healthcare IT Tech

This course will help prep you to earn the CompTIA Healthcare IT Technician certification showing that you have the knowledge and skills needed to succeed in installing, managing, and troubleshooting IT systems in medical and clinical settings.

Hi
When I connect to Tableau server via HTTP address - which use to work fine - I now get HTTP404 blank page.
Any ideas as have a demo tomorrow!

Regards
0
HTTPAPI_debug.txtWS HTTP API(library LIBHTTP).
IBM-i Client Connection to Webserver: handshake problem.  
Immediatelly after clientHello, the  server resets  connection.

ibm-i Joblog messages .
   Message . . . . :   (GSKit) An operation which is not valid for the current
     SSL session state was attempted.                                          
   Cause . . . . . :   No additional online help information is available.    
 40   18/01/19  15:36:49.874491  HTTPAPIR4    LIBHTTP     *STMT    RSUCISLO2  
   From module . . . . . . . . :   HTTPUTILR4                                  
   From procedure  . . . . . . :   HTTP_CRASH                                  Handshakke-problem-from-7_3-LPAR.docx
   Statement . . . . . . . . . :   4068                                        
   Message . . . . :   SSL Handshake: (GSKit) I/O: A connection with a remote  
     socket was reset by that

TLS-Version.PNG
0
I'm trying to use code that I don't understand to gather statistics about myself from experts-exchange. The code begins with the following. Note the cryptic comment at line 12. In any case when I run the code and enter https://www.experts-exchange.com in the input box I get an "A security error occurred" error at line 26. What am I doing wrong?
Private Sub HTML_VBA_Excel()
    Dim oXMLHTTP As Object
    Dim sPageHTML  As String
    Dim sURL As String
    Dim intName As Integer
    Dim intEnd As Integer
    Dim strParts() As String
    Dim strStartString As String
    Dim intNewLine As Integer
    Dim lngLastRow As Long
    Dim lngRow As Long
 '  doesn't work correctly
    Application.ScreenUpdating = False
    Columns("A:B").ClearContents
    strStartString = "target=" & """" & "_blank" & """" & ">"
   
    sURL = "Start"
    Do While sURL <> ""
        sURL = InputBox("Enter search result URL")
    
       'Extract data from website to Excel using VBA
       Set oXMLHTTP = CreateObject("MSXML2.ServerXMLHTTP")
'       oXMLHTTP.Open "GET", sURL, False
       oXMLHTTP.Open "GET", sURL, False

       oXMLHTTP.send
       sPageHTML = oXMLHTTP.responseText

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0
HI,
I am getting the following error on making a postman request -
How can i increase the timing or can resolve this some other way.
The corresponding application is running with debugger with this option -
-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005

Screen-Shot-2018-12-19-at-1.44.06-PM.png
Thanks
0
Hello,
I searched Experts and found a comment linking to documentation to set up URL rewrite:

Regarding the comment:

https://www.experts-exchange.com/questions/29093041/Server-2016-HTTP-2-HTTPS-redirect.html#a42565398

I'm trying to set a URL rewrite from http to https in IIS 8.5 using the steps outlined in the following article mentioned in the comment above.

https://blogs.technet.microsoft.com/dawiese/2016/06/07/redirect-from-http-to-https-using-the-iis-url-rewrite-module/

My settings are exactly the same, but it's not re-directing to the https, but just times out. Any ideas would be appreciated.

Debra
http.PNG
0
Hi All

I'm using a Windows Server 2012 R2 Standard with IIS Version 8.5.9600. I'm trying to redirect link A to link B, see below

Link A
ifly.com.au/special

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Link B
https://downunder.iflyworld.com/book-now/gifting-step3-special?code=BLOCKS&tunnel=PEN

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I created a web.config file under the iFLY.com.au folder, the web.config consists of the below

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
<httpRedirect destination="https://downunder.iflyworld.com/book-now/gifting-step3-special?code=BLOCKS&tunnel=PEN"/>
    </system.webServer>
</configuration>

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When I try to access the iFLY.com.au/special I get the
500 - Internal server error.

500 - Internal server error.
There is a problem with the resource you are looking for, and it cannot be displayed.

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Any help is greatly appreciated!
0
Hi all,
I am trying to create a login form in Angular 6. My test app check the data written from the current user and try to match with the data received from a remote service via http (post). This is the point: with a simple request as following, all works correctly. But what about a request also with header and token? How can I create a function with this information? Or, do you have a link with a specific tutorial for this case? Thank you very much!

PS: I almost never insert "urgent" for a request but this is really urgent!

    onlogin(): void {
    
    .get('myLink'=;
    .subscribe(data => {
        this.data = data;
        this.loading = false});
    }
    
    (....)

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(example from official Angular 6 Book, page 157)
0
What are the steps required to change an IIS hosted website from HTTP to HTTPS?
0
How do I get the actual TOTAL byte size of the HTTP header being sent to a server? Is there any way in Chrome to see the size of the complete request?
1
Exploring SQL Server 2016: Fundamentals
LVL 13
Exploring SQL Server 2016: Fundamentals

Learn the fundamentals of Microsoft SQL Server, a relational database management system that stores and retrieves data when requested by other software applications.

I have a service which calls a web service returning text data. Basically service is trying to return a file content which is mostly text.

here is my service call

getFile(title: string, identifier: string) {
    console.log('returning service');
    return this.http
      .get(this.constructFileURL(title, identifier), { headers: this.createHeader() });
  }

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Here is how I am subscribing to it

 getFileContent(title: string, display: DisplayContent, identifier: string) {
    console.log('calling service');
    this.fileService.getFile(title, identifier).subscribe(results => {
      console.log('displaying results');
      display.content = JSON.stringify(results);
      console.log(display.content);
      this.data.changeContent(display);
    });
    return this.fileData;
  }

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I am getting following error on the console. Note : 'console.log('displaying results')' is not getting printed on the console

HttpErrorResponse {headers: HttpHeaders, status: 200, statusText: "OK",
error
:
SyntaxError: Unexpected token e in JSON at position 1 at JSON.parse (<anonymous>) at XMLHttpRequest.onLoad (http://localhost:4200/vendor.js:7822:51) at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (http://localhost:4200/polyfills.js:14960:31) at Object.onInvokeTask (http://localhost:4200/vendor.js:36079:33) at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (http://localhost:4200/polyfills.js:14959:36) at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (http://localhost:4200/polyfills.js:14727:47) at ZoneTask.push../node_modules/zone.js/dist/zone.js.ZoneTask.invokeTask [as invoke] (http://localhost:4200/polyfills.js:15035:34) at invokeTask (http://localhost:4200/polyfills.js:16079:14) at XMLHttpRequest.globalZoneAwareCallback (http://localhost:4200/polyfills.js:16105:17)
text
:
"test"
__proto__
:
Object

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Not able to figure out what is wrong. I do convert JSON to string just to be safe as show in the code
0
I have had a few people tell me that when trying to visit a site using safari on their iPhones, they get an error that says:

Safari cannot open the page because the server cannot be found.

I asked other people to test on their iPhones and they said it works fine. After asking Google about this it seems that the answer is always something to do with the phone itself. But, it is not realistic to ask everyone with an iPhone to check this setting, and check that setting in order to try use the website.

Does anyone have any suggestions regarding this?
0
Because I am taking over for an ex-employee, I am tasked with finding out why a visitor who's logged in session times out 24 hours after inactivity can still see certain things that they should only be able to see when logged in, like special pricing. It was originally designed this way, because the boss wanted government customers who have logged in at some point to always be able to see their government pricing, whether they were currently logged in or not. Now, that decision has been reversed, and we only want them to see their government pricing if their current logged in session is valid.

we use Symfony2 on Unix / Apache if that matters

I have no idea if it's a cookie, a session, or whatever else

I know we utilize both but I don't know if the answer lies in either place
0
HttpURLConnection getInputStream throws below errors sometimes -

java.lang.RuntimeException: java.io.IOException: Server returned HTTP response code: 500

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Here is the part of callstack -

09:05:02,198 ERROR [stderr] (http-/111.222.333.444:11800) java.io.IOException: Server returned HTTP response code: 500 for URL: https://111.222.333.444:11800/xyz/myapp/3.0/urn:name:ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJ
09:05:02,198 ERROR [stderr] (http-/111.222.333.444:11800)   at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1628)
09:05:02,199 ERROR [stderr] (http-/111.222.333.444:11800)   at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:254)

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This is a how my code looks like. This is not a client code. This runs on server like Tomcat -

private void getResult(HttpURLConnection urlconnection,
            String result) {
        BufferedReader bufferedReader;
        String line;
        try {

            bufferedReader = new BufferedReader(new InputStreamReader(
                    urlconnection.getInputStream()));

            while ((line = bufferedReader.readLine()) != null) {
                result += line;
            }

            bufferedReader.close();
        } catch (Exception ex) {
            String error = String.format("Invalid InputStream, %s",
                    ex.getMessage());
        }

        return;

}

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The URL that I have prepared looks like below -

 https://111.222.333.444:11800/xyz/myapp/3.0/urn:name:ABCDEFGHIJKLMNOPQRSTUVWXYZABCDEFGHIJ

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Can this be java problem or server is responsible for this? What could be the problem?
0
Hi Experts,

I'm looking to modify the below to be an update instead of a select.
however not sure where do I put in the body param as specified below
https://howto.caspio.com/web-services-api/rest-api/older-rest-api-versions/table-operations/

Function GetDataFromCASPIO1()
    Dim objHTTP As New WinHttp.WinHttpRequest
    Dim docXML As MSXML2.DOMDocument
    Dim ResponseText As String
    Dim curNode As IXMLDOMNode
    Dim oNodeList As IXMLDOMSelection
    Dim s As String

    Set docXML = New MSXML2.DOMDocument

    Set objHTTP = New WinHttp.WinHttpRequest
    URL = "https://MyAccount.caspio.com/oauth/token"
    
    objHTTP.Open "POST", URL, False
    objHTTP.SetRequestHeader "Content-Type", "application/x-www-form-urlencoded"

    objHTTP.Send 
    ResponseText = Right(objHTTP.ResponseText, Len(objHTTP.ResponseText) - 17)
    access_token = Left(ResponseText, InStr(ResponseText, """") - 1)
    'Debug.Print access_token


    Set objHTTP = New WinHttp.WinHttpRequest

    URL = "https://MyAccount.caspio.com/rest/v1/tables/Skilled_Nursing_Visit_Note/rows?q={""limit"":10000,""where"":""visit_date>=GetDate()-7""}"

    '''objHTTP.Open "GET", URL, False
    objHTTP.Open "Put", URL, False
    objHTTP.SetRequestHeader "Accept", "application/xml"
    objHTTP.SetRequestHeader "Content-Type", "application/json"
    objHTTP.SetRequestHeader "Authorization", "Bearer " + access_token


    objHTTP.Send
    'Debug.Print objHTTP.Status
    'Debug.Print objHTTP.ResponseText
  

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0
Hi,

Found these meta tags to ensure a page always reloads.

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="Cache-Control" content="no-cache">
<meta http-equiv="Expires" content="0">

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Seen some pages where, despite having them, the cache still is used.

What can you recommend to add to these to be sure that the page arrives fresh each time?

Thanks!

OT
0
How do I send a http request to a webserver using post without a web browser.

IE this will come from a script, what does the script look like?

Andy
0
I am trying to connect to a secure VAN and push and pull files over a secure connection.  As we are trying to set it up, the people at the VAN are getting this error.

Error Message:

AS2 Outbound has a HTTP proxy server to connect through.Probably error while connecting to proxy : [Error sending document over http to host [http://X.X.213.93], status code [405], reason [Method Not Allowed], response from server [<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">< html xmlns="http://www.w3.org/1999/xhtml">< head>< meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"/>< title>405 - HTTP verb used to access this page is not allowed.</title>< style type="text/css">< !-- body{margin:0;font-size:.7em;font-family:Verdana, Arial, Helvetica, sans-serif;background:#EEEEEE;} fieldset{padding:0 15px 10px 15px;} h1{font-size:2.4em...]]

Summary:

Sending of document [167499846.edi] to [http://X.X.213.93] FAILED

Any ideas of what I am missing or doing wrong?  The X.X.213.93 is the public IP of my machine receiving the files.

Thanks
0
Need to write a script which:
1. Download the json file (curl request)
2. Rename the file to  YYYYMMDDHHMM_lng.xml
3. Push it to a shared folder (for example //192.168.1.1/log)
0
JavaScript Best Practices
LVL 13
JavaScript Best Practices

Save hours in development time and avoid common mistakes by learning the best practices to use for JavaScript.

Hi Experts

I am working on a wagtail project(like django-cms) I get this error when I run python3 manage.py runserver 0.0.0.0:8000

 
code 400, message Bad request syntax 
  ('\x16\x03\x01\x00®\x01\x00\x00ª\x03\x03³\x06âP\x97Þ%<Sg\x13Ö×[zE\x96\x15?
  \x96\x00\x1ah')
  You're accessing the development server over HTTPS, but it only supports 
  HTTP.

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I had changed SECURE_SSL_REDIRECT=FALSE and tested it still i get this same error. I had disabled cache in chrome.

 I had deactivated chorme caching in registry  by following steps.
Deactivate Chrome Cache in the Registry

Open Registry (Start -> Command -> Regedit)

Search for: HKEY_CLASSES_ROOT\ChromeHTML\shell\open\command

Change the part after ...chrom.exe" to this value: –disable-application- cache –media-cache-size=1 –disk-cache-size=1 — "%1"

Example: "C:\Program Files (x86)\Google\Chrome\Application\chrome.exe" - disable-application-cache –media-cache-size=1 –disk-cache-size=1 — "%1"

I had also tried disable cache from chrome developer tools network -disable cache.

I had also tried by clearing cache from hsts on chrome.

I had also tried from incognito window on chrome. But still I get the same error

It is an Ubuntu machine on AWS(accessed by putty from windows pc).

I access from outside (windows pc - local pc )through http://54.23x.9x.17:8000 I am not able to resolve this error.


I had tried on some other machine.  I got the following error on console for Linux Ubuntu

it is changing to https instead of http and I got "GET / HTTP/1.1" 301 0 on console window


Please help me in resolving this error.

With Many Thanks, Bharath AK
0
CNAME Record caused my emails to fail.

I hosted 2 emails at RackSpace for my domain, and verified they worked fine. This required me to update the MX records where I host my domain.
name1@domain1.com
name2@domain1.com


Fine.

Then, before I could create a website, I was allowed by my partner to point my domain at his website.

The redirect worked once I created a CNAME record.
domain1.com brings up the site at domain2.com

But the emails stopped working.

The error is "553 Relaying disallowed"

I called RackSpace and they said it's because the MX records at the domain2.com, where domain1.com points at, are pointing to Zoho (a major email provider).

So, my question is...

If I move my two emails from RackSpace to Zoho, can I have a solution where

1) domain forwarding is working (domain1.com brings up the site at domain2.com)
2) emails work as well (both (domain1.com emails work again)

?

Thanks.

Or, is there another way to configure this?

Thanks
0
Why can I not update the URL in the browser?

I update QueryString and remove a malicious parameter. But, after executing the following code:

                filterContext.HttpContext.RewritePath(filterContext.HttpContext.Request.Path,
                                                       filterContext.HttpContext.Request.PathInfo,
                                                       filterContext.HttpContext.Request.QueryString.ToString());

Still see that bad domain.

I may be fighting development automation inside my own project;

I paste the following into the browser...

http://SENB-0186.mydomain.org/ContentManagement/?
goto=http%3a%2f%2fsenb-0186.mydomain.org.evil.com%3a80%2fContentManagement%2f

My code captures the goto parameter and removes it from the QueryString. I call the RewritePath() function above, and see the following in the browser


https://dev.nim.mydomain.org/IdentityServices//?return=http://senb-0186.mydomain.org
/ContentManagement/Account/LogOn?ReturnUrl=%2fContentManagement%2f%3fgoto%3dhttp%253a%252f%252f
senb-0186.mydomain.org.evil.com%253a80%252fContentManagement%252f&u
gid=040dec88-8a99-4410-bf72-1d868a207c8d

I have no problem with the introduction of https://dev.nim.mydomain.org/IdentityServices//?
but I do have a problem that the  mydomain.org.evil.com sub-domain re-appears.

Suggestions?

I even created a copy of QueryString, made the deletions on the sanitized version. But that also fails.

                …
0
Need to Redirect after removing one or more query string params.


I am using a whitelist to remove dangerous query string params, and when done, need to redirect to whatever is left in the  query string.

I understand things may break, but am okay letting our website's existing default behavior handle it.

What is the exact command to redirect?

ActionExecutingContext filterContext is the input param of the ActionFilterAttribute

        public override void OnActionExecuting(ActionExecutingContext filterContext)

and after removing the faulty query string params from:

filterContext.HttpContext.Request.QueryString

I am ready to redirect.

                filterContext.HttpContext.Response.Redirect(filterContext.HttpContext.Request.);

Please complete the the above parameter for Redirect()

Thanks
0
I have a web application built in vb.net. The home page is "main.aspx". I have x3 other websites that are directing traffic to the this website...the redirects are pointed to the main.aspx page. How can I capture which site the traffic is coming from? I'm thinking something with the headers. I would really like to capture the referring url or something that is unique.
0
I have Tomcat 8.0.35 running, web application running from IntelliJ IDEA 2017.3.3 (build successful and WAR deployed) but the browser (I tried with Chrome, Firefox, and IE) is showing HTTP Status 404 when I try to access http://localhost:8080/ or http://127.0.0.1:8080/.

I built my web application with Maven as WAR. The WAR file was successfully deployed in Tomcat's "/webapps/ROOT" directory and "index.html" and "index.jsp" are there and at the end of the deployment the browser page is open.

Tomat is configured to default ports: 8080, 8081, 8009.
localhost-8080---WAR-artifact-is-dep.PNG
localhost-8080---http-status-404.PNG
0

HTTP Protocol

The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, hypermedia information systems. Hypertext is structured text that uses logical links (hyperlinks) between nodes containing text. HTTP is the protocol to exchange or transfer hypertext. HTTP functions as a request-response protocol in the client-server computing model. HTTP is designed to permit intermediate network elements to improve or enable communications between clients and servers. HTTP is an application layer protocol designed within the framework of the Internet Protocol Suite; it presumes an underlying and reliable transport layer protocol.

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HTTP Protocol
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