We Keep Coding

upload feed to walmart

I am breaking my head trying to upload a feed to walmart, after many times trying i used postman to generate C# restsharp code for me, in postman it works, but when using the c# restsharp code it returns a mysterious error. like this:
"No message body writer has been found for response class FeedAcknowledgement"
what does that mean?
here is my code:
string requestUrl = "";
requestUrl = string.Format("https://marketplace.walmartapis.com/v2/feeds?feedType=inventory");
string method = "POST";
// string[] sig = getSig(method, requestUrl).Replace("\r", "").Split('\n');
var mySig = new Signature(ConsumerID, SecretKEY, requestUrl, method);
var s = mySig.TimeStamp;
var returendSigniture = mySig.GetSignature(s);
var client = new RestClient("https://marketplace.walmartapis.com/v2/feeds?feedType=inventory");
var request = new RestRequest(Method.POST);
//request.AddHeader("postman-token", "c325ba5f-813a-f990-7899-6bfc4b14aa1b");
request.AddHeader("cache-control", "no-cache");
request.AddHeader("content-type", "multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW");
request.AddHeader("accept", "application/xml");
request.AddHeader("wm_consumer.id", "--");
request.AddHeader("wm_sec.auth_signature", returendSigniture);
request.AddHeader("wm_sec.timestamp", mySig.TimeStamp);
request.AddHeader("wm_qos.correlation_id", "123456abcdef");
request.AddHeader("wm_svc.name", "Walmart Marketplace");
request.AddParameter("multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW", "------WebKitFormBoundary7MA4YWxkTrZu0gW\r\nContent-Disposition: form-data; name=\"BOUNDERY\"\r\n\r\n<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<wm:inventory xmlns:wm=\"http://walmart.com/\">\n <wm:sku>PP00500-2PC</wm:sku>\n <wm:quantity>\n <wm:unit>EACH</wm:unit>\n <wm:amount>120</wm:amount>\n </wm:quantity>\n <wm:fulfillmentLagTime>1</wm:fulfillmentLagTime>\n</wm:inventory>\r\n------WebKitFormBoundary7MA4YWxkTrZu0gW--", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);

I spent all day in figuring out how to request Walmart v3. I propose you the following two steps:
Use Walmart signer in order to generate signed token.
You will need to use HttpWebRequest for getting response from Walmart in a way similar to what is described here.

I have not been able to get this to work natively in C#, but I do have a work around.
The Java SDK can successfully submit multi-part requests to Walmart. I wrote a wrapper around the SDK functions that can accept basic command line input to read a text file and send the appropriate call with attached files. From here, you can just call the .jar file (I do it via dynamically generated batch file) from your C# program and receive responses back via text file. This is a sub-optimal system, but it works reliably and when the choice was between updating inventory on 2000 items every day and using some dirty code, I went with the Java wrapper method. This will be replaced as soon as the C# SDK comes out, but I believe this is one of the reasons why the C# SDK may be being delayed.
This solution was used, only after spending about a week trying to get boundaries / streams / attachments to work in C# and having zero success. Cases were also submitted to walmart and I was able to work with some of their top tier engineering support staff and this problem completely stumped them. I was able to trace the Java SDK execution all the way down to a built in Maven / Java function that constructed the web request so there's something under the hood that Java is doing with a multi-part request that isn't immediately clear in C#.

German characters sending data using POST method from ASP page to PHP page

I have a problem with sending data from ASP with the POST Method to a PHP page.
I would like to send mail with names. And since I live in Austria the names are in German and we have some Special characters. These characters don't arrive write.
I'm still pretty new to programming with C# btw. I had the Website before in Java-Script but I had to connect it with a database and therefore I switched to C# and now I'm like a "babe in the woods".
this.hdnDaten.Value = "ÄÖÜ|äöü|ß|é|#";
// mit POST versuchen
using (var client = new WebClient())
{
var postData = new System.Collections.Specialized.NameValueCollection();
postData.Add("von", this.hdnVon.Value);
postData.Add("an", this.hdnAn.Value);
postData.Add("betreff", this.hdnBetreff.Value);
postData.Add("daten", this.hdnDaten.Value);
byte[] response = client.UploadValues("http://xxxxxx.php", "POST", postData);
var responsebody = Encoding.UTF8.GetString(response);
}
And this is how the characters (in this.hdnDaten.Value) from above arrive in the mail-body:
ÄÖÜ|äöü|ß|é|#
Does anybody know what I can do to get the same characters in the end?
Edit 20143013: I think I have a clue: I have to encode the postData into ANSI (Codepage 1252). I tried do do this, but it doesn't work. Does anybody have an Idea how I could do this?
Edit 20140320: I don't even dare to give you the answer: I was looking all the time in the wrong place (somewhat like MH370): The problem was with the receiving side of the mail (I was using a POP3-Viewer for testing); when I downloaded the mail to Outlook everything was OK. The funny thing was that this didn't happen in the original (Javascript) Version that's why I was looking at the wrong place.
Thanks
Eddie

Try setting client.Encoding to UTF-8 before calling UploadValues. Also ensure that you read the text as UTF-8 on the server.

Try this.hdnDaten.Value = HttpUtility.UrlEncode("ÄÖÜ|äöü|ß|é|#"); on your post parameters.
on PHP you'll need to decode the parameters via html_entity_decode

Using JSON and HTTP Request in C#

I'm currently developing an Android app and I'm using Connect Android to MS SQL Server Tutorial to link my MSSQL server to the code.
And the first part is good though the second part is using a third party program to code which I don't want to. I want to write the whole code in C# (I'm using Xamarin).
I found out Json.NET / Json.NET for Xamarin website.
Though how am I supposed to use the HTTPUtils and requests in C# ? An example would be great.
Also, I have kind of a newbie question, I'm trying to get to the root of the code I sent, the .aspx file, and I don't quite understand where the web method is, I am used to a seperate .asmx file containing [Web Method]s that define them and then I can use them freely by creating a web reference on an .aspx file, so, where is the web method in the code I sent ?

public static String getJsonData(String webServiceName,String parameter)
{
try
{
String urlFinal=SERVICE_URI+"/"+webServiceName+"?parameter=";
HttpPost postMethod = new HttpPost(urlFinal.trim()+""+URLEncoder.encode(parameter,"UTF-8"));
postMethod.setHeader("Accept", "application/json");
postMethod.setHeader("Content-type", "application/json");
HttpClient hc = new DefaultHttpClient();
HttpResponse response = hc.execute(postMethod);
Log.i("response", ""+response.toString());
HttpEntity entity = response.getEntity();
String responseText = EntityUtils.toString(entity);
string=responseText;
Log.i("Output", ""+responseText);
}
catch (Exception e) {
// TODO: handle exception
}
return string;
}

Using WebClient to pass arrays as part of message body for post action

I am writing a console application that needs to perform a POST to an MVC controller. I am using the WebClient class to perform the POST. But I'm having trouble understanding how to add arrays to the message body.
For simple parameters, it seems to work if I do this:
using (var client = new WebClient())
{
var values = new NameValueCollection
{
{ "userName", "userName" },
{ "password", "passwordGoesHere"}
};
byte[] responseArray = client.UploadValues(String.Format("{0}/Mobile/StartSession", serverAddress), values);
Debug.WriteLine(String.Format("\r\nResponse received was :\n{0}\n", Encoding.ASCII.GetString(responseArray)));
}
I was trying to find how to pass arrays in the message body when using WebClient (for calling one of the other methods). I came across this solution: POST'ing arrays in WebClient (C#/.net)
It appears the solution actually passes parameters in the query string (and not in the message body). This seems to work in any case, as the HttpPost method on the MVC controller is still receiving the correct information. However, another method requires that I pass an image as an array of bytes. This is too large to be passed in the querystring and so the call fails.
So my question is, using the code I provided above, how can I add arrays in there as well. So an array of bytes for example, but also an array of strings.
If any one can provide me with a solution it would be much appreciated, or if I'm incorrect in my thinking please let me know.
Thanks

Instead of using array of bytes maybe you should POST a file in the same way files are uploaded from browser from file inputs. This way you will save some transfered bytes, but you have to use HttpWebRequest instead of WebClient. More about this solution is here:
Upload files with HTTPWebrequest (multipart/form-data)
You upload bytes as "multipart/form-data" content type. On the server you will receive the streams of bytes in Request.Files collection.

Reading and posting to web pages using C#

I have a project at work the requires me to be able to enter information into a web page, read the next page I get redirected to and then take further action. A simplified real-world example would be something like going to google.com, entering "Coding tricks" as search criteria, and reading the resulting page.
Small coding examples like the ones linked to at http://www.csharp-station.com/HowTo/HttpWebFetch.aspx tell how to read a web page, but not how to interact with it by submitting information into a form and continuing on to the next page.
For the record, I'm not building a malicious and/or spam related product.
So how do I go read web pages that require a few steps of normal browsing to reach first?

You can programmatically create an Http request and retrieve the response:
string uri = "http://www.google.com/search";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
// encode the data to POST:
string postData = "q=searchterm&hl=en";
byte[] encodedData = new ASCIIEncoding().GetBytes(postData);
request.ContentLength = encodedData.Length;
Stream requestStream = request.GetRequestStream();
requestStream.Write(encodedData, 0, encodedData.Length);
// send the request and get the response
using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
{
// Do something with the response stream. As an example, we'll
// stream the response to the console via a 256 character buffer
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
Char[] buffer = new Char[256];
int count = reader.Read(buffer, 0, 256);
while (count > 0)
{
Console.WriteLine(new String(buffer, 0, count));
count = reader.Read(buffer, 0, 256);
}
} // reader is disposed here
} // response is disposed here
Of course, this code will return an error since Google uses GET, not POST, for search queries.
This method will work if you are dealing with specific web pages, as the URLs and POST data are all basically hard-coded. If you needed something that was a little more dynamic, you'd have to:
Capture the page
Strip out the form
Create a POST string based on the form fields
FWIW, I think something like Perl or Python might be better suited to that sort of task.
edit: x-www-form-urlencoded

You might try Selenium. Record the actions in Firefox using Selenium IDE, save the script in C# format, then play them back using the Selenium RC C# wrapper. As others have mentioned you could also use System.Net.HttpWebRequest or System.Net.WebClient. If this is a desktop application see also System.Windows.Forms.WebBrowser.
Addendum: Similar to Selenium IDE and Selenium RC, which are Java-based, WatiN Test Recorder and WatiN are .NET-based.

What you need to do is keep retrieving and analyzing the html source for each page in the chain. For each page, you need to figure out what the form submission will look like and send a request that will match that to get the next page in the chain.
What I do is build a custom class the wraps System.Net.HttpWebRequest/HttpWebResponse, so retrieving pages is as simple as using System.Net.WebClient. However, my custom class also keeps the same cookie container across requests and makes it a little easier to send post data, customize the user agent, etc.

Depending on how the website works you can either manipulate the url to perform what you want. e.g to search for the word "beatles" you could just open a request to google.com?q=beetles and then just read the results.
Alternatively if the website does not use querystring values (url) to process page actions then you will need to work on a webrequest which posts the required values to the website instead. Search in Google for working with WebRequest and webresponse.