Develop Reference

Empty value returned by RestSharp

The code block below returns me a emtpy value. But when I send a request on the postman side, the data reaches me without any problems. What do you think is the problem? Could you help? Thank you.
Code:
ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
var client = new RestClient("url");
client.Timeout = -1;
var request = new RestRequest(Method.GET);
request.AddHeader("Content-Type", "application/json");
request.AddHeader("Authorization", "Basic mytoken");
var body = #"{" + "\n" +
#" ""size"": 1," + "\n" +
#" ""page"": 1," + "\n" +
#" ""start_date"": ""2022-01-02""," + "\n" +
#" ""end_date"": ""2022-01-03""" + "\n" +
#"}";
request.AddParameter("application/json", body, ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
MessageBox.Show(response.Content);
REST Return Emtpy Value

Try using AddJsonBody(), Instead of AddParameter() with anonymous object
//Kindly check the type of start_date and end_date property.
var body = new { Size = 1, Page = 1, start_date="2022-01-02", end_date="2022-01-03"};
request.AddJsonBody(body);
From Documentation:
AddParameter("application/json", ..., ParameterType.RequestBody) won't work, use AddBody() instead, or better, AddJsonBody

How to generate signature for Oauth1.0 for here api c#

I want to send access token request for bearer token to here api.(https://developer.here.com/tutorials/how-to-authenticate-with-here-oauth/)
They showed example using node. But I tried the same way in c#. But I got 400 bad request. My code is as following:
var url = "https://account.api.here.com/oauth2/token";
String id = "key id";
String secret = "key secret";
var httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.Method = "POST";
var timeStamp = ((int)(DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalSeconds).ToString();
var nonce = Convert.ToBase64String(Encoding.UTF8.GetBytes(timeStamp));
var signatureBaseString = Escape(httpWebRequest.Method.ToUpper()) + "&";
signatureBaseString += url.ToLower() + "&";
signatureBaseString +=
"oauth_consumer_key=" + id + "&" +
"oauth_nonce=" + nonce + "&" +
"oauth_signature_method=" + "HMAC-SHA1" + "&" +
"oauth_timestamp=" + timeStamp + "&" +
"oauth_version=" + "1.0";
var key = secret;
var signatureEncoding = new ASCIIEncoding();
var keyBytes = signatureEncoding.GetBytes(key);
var signatureBaseBytes = signatureEncoding.GetBytes(signatureBaseString);
string signatureString;
using (var hmacsha1 = new HMACSHA1(keyBytes))
{
var hashBytes = hmacsha1.ComputeHash(signatureBaseBytes);
signatureString = Convert.ToBase64String(hashBytes);
}
string SimpleQuote(string s) => '"' + s + '"';
var header =
"Content-Type=application/x-www-form-urlencoded" + "," +
"Authorization=OAuth" + "," +
"oauth_consumer_key=" + SimpleQuote(id) + "," +
"oauth_nonce=" + SimpleQuote(nonce) + "," +
"oauth_signature_method=" + SimpleQuote("HMAC-SHA1") + "," +
"oauth_timestamp=" + SimpleQuote(timeStamp) + "," +
"oauth_version=" + SimpleQuote("1.0") + "," +
"oauth_signature= " + SimpleQuote(signatureString);
httpWebRequest.Headers.Add(HttpRequestHeader.Authorization, header);
string postData = "grant_type=client_credentials";
ASCIIEncoding encoding = new ASCIIEncoding();
byte[] byte1 = encoding.GetBytes(postData);
httpWebRequest.ContentLength = byte1.Length;
var newStream = httpWebRequest.GetRequestStream(); // get a ref to the request body so it can be modified
newStream.Write(byte1, 0, byte1.Length);
newStream.Close();
var response = httpWebRequest.GetResponse();
May be I am generating the signature in wrong way. But I only have key id and secret and I managed to implement this far. Please help me pointing the mistake I made.

Would you please have a look below article?
Getting (401) UnAuthorized error on some requests not all, but most
Try to use different lib such as HttpClient or RestClient.

How can I send or get a file through rest api

How can I move a file (for example: in pdf format) that is in a folder with me locally through an api call in a folder in a document management system?
This is a small cod section of the api call that takes over the task.
client = new RestClient("http://***.***.***.*");
client.Authenticator = new HttpBasicAuthenticator("******", "******");
client.Timeout = -1;
request = new RestRequest("/*****/api/*****/*****/371 ", Method.POST);
request.AddHeader("content-type", "multipart/form-data");
request.AlwaysMultipartFormData = true;
request.AddParameter("Object", "{" +
"\"****\":\"*****\"," +
"\"name\":\"*******\"," +
"\"******\":\"2\"," +
"\"fields\":{" +
"\"*******\":{\"value\":\"" + DateTime.Now.ToString("dd.MM.yyyy") + "\"}" +
"}" +
"}");
request.AddFile("File", "C:/Users/********/Documents/****/*****/pdf.pdf");
response = client.Execute(request);
Console.WriteLine(response.Content);
}
}
}
I would have to obscure a few places with stars
Thank You

Sending a JSON request to ebay API

Ok so I'm having a bit of trouble getting these JSON requests through to the Ebay API.
Here is the json request:
string jsonInventoryRequest = "{" +
"\"requests\": [";
int commaCount = 1;
foreach (var ep in productsToProcess)
{
jsonInventoryRequest += "{\"offers\": [{" +
"\"availableQuantity\":" + ep.EbayProductStockQuantity + "," +
"\"offerId\":\"" + ep.EbayID.ToString() + "\"," +
"\"price\": {" +
"\"currency\": \"AUD\"," +
"\"value\":\"" + ep.EbayProductPrice.ToString() + "\"" +
"}" +
"}],";
jsonInventoryRequest += "\"shipToLocationAvailability\": " + "{" +
"\"quantity\":" + ep.EbayProductStockQuantity +
"},";
jsonInventoryRequest += "\"sku\": " + ep.EbayProductSKU.ToString() + "}";
if (commaCount < productsToProcess.Count())
jsonInventoryRequest += ",";
commaCount++;
sendEbayApiRequest = true;
}
jsonInventoryRequest +=
"]" +
"}";
And the Debug.WriteLine() output of the above JSON request is :
json string = {"requests": [{"offers": [{"availableQuantity":0,"offerId":"098772298312","price": {"currency": "AUD","value":"148.39"}}],"shipToLocationAvailability": {"quantity":0},"sku": 135779},{"offers": [{"availableQuantity":1,"offerId":"044211823133","price": {"currency": "AUD","value":"148.39"}}],"shipToLocationAvailability": {"quantity":1},"sku": 133607}]}
Here is the code in C# to send the request:
var ebayAppIdSetting = _settingService.GetSettingByKey(
"ebaysetting.appid", "");
var ebayCertIdSetting = _settingService.GetSettingByKey(
"ebaysetting.certid", "");
var ebayRuNameSetting = _settingService.GetSettingByKey(
"ebaysetting.appid", "");
var stringToEncode = ebayAppIdSetting + ":" + ebayCertIdSetting;
HttpClient client = new HttpClient();
byte[] bytes = Encoding.UTF8.GetBytes(stringToEncode);
var base64string = "Basic " + System.Convert.ToBase64String(bytes);
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Authorization", base64string);
var stringContent = "?grant_type=client_credentials&" + "redirect_uri=" + ebayRuNameSetting + "&scope=https://api.sandbox.ebay.com/oauth/api_scope";
var requestBody = new StringContent(stringContent.ToString(), Encoding.UTF8, "application/json");
requestBody.Headers.ContentType = new MediaTypeHeaderValue("application/x-www-form-urlencoded");
var response = client.PostAsync("https://api.sandbox.ebay.com/identity/v1/oauth2/token", requestBody);
The output I get when I do Debug.WriteLine("response.Content = " + response.Result); is:
response.Content = StatusCode: 401, ReasonPhrase: 'Unauthorized',
Version: 1.1, Content: System.Net.Http.StreamContent, Headers: {
RlogId:
t6ldssk%28ciudbq%60anng%7Fu2h%3F%3Cwk%7Difvqn*14%3F0513%29pqtfwpu%29pdhcaj%7E%29fgg%7E%606%28dlh-1613f3af633-0xbd
X-EBAY-C-REQUEST-ID: ri=HNOZE3cmCr94,rci=6kMHBw5dW0vMDp8A
X-EBAY-C-VERSION: 1.0.0 X-EBAY-REQUEST-ID:
1613f3af62e.a096c6b.25e7e.ffa2b377!/identity/v1/oauth2/!10.9.108.107!r1esbngcos[]!token.unknown_grant!10.9.107.168!r1oauth-envadvcdhidzs5k[]
Connection: keep-alive Date: Mon, 29 Jan 2018 00:04:44 GMT
Set-Cookie: ebay=%5Esbf%3D%23%5E;Domain=.ebay.com;Path=/
WWW-Authenticate: Basic Content-Length: 77 Content-Type:
application/json }
Can anyone see where I'm going wrong. Cheers

Ok so the authentication was failing because I was sending wrong authentication token. Needed to get oauth token from application tokens.
So instead of base64 encoding token like this:
var base64string = "Basic " + System.Convert.ToBase64String(bytes);
client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Authorization", base64string);
I needed to do the following:
url = "https://api.sandbox.ebay.com/sell/inventory/v1/bulk_update_price_quantity";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "POST";
//request.ContentType = "application/json; charset=utf-8";
request.Headers.Add("Authorization", "Bearer **OAUTH TOKEN GOES HERE WITHOUT ASTERIKS**");
// Send the request
using (var streamWriter = new StreamWriter(request.GetRequestStream()))
{
streamWriter.Write(jsonInventoryRequest);
streamWriter.Flush();
streamWriter.Close();
}
// Get the response
HttpWebResponse response = (HttpWebResponse) request.GetResponse();
if (response != null)
{
using (var streamReader = new StreamReader(response.GetResponseStream()))
{
// Parse the JSON response
var result = streamReader.ReadToEnd();
}
}

How to send ONVIF request to web camera with authorization, using SOAP action and HttpClient

I'm working on project for discovering and controlling web cameras in local network. I'm a C++ programmer, so I'm not good in .NET but this project we write on C# and I have some problems. I'm using DiscoveryClient for discovering all devices in local network. Next, I get camera address, creating HttpClient and trying to send SOAP action. ONVIF specifications: http://www.onvif.org/onvif/ver10/device/wsdl/devicemgmt.wsdl. Some actions (e.g. GetServiceCapabilities) returns responses, but most actions returnes this error:
<env:Body><env:Fault><env:Code><env:Value>env:Sender</env:Value>
<env:Subcode><env:Value>ter:NotAuthorized</env:Value>
</env:Subcode>
</env:Code>
<env:Reason><env:Text xml:lang="en">The action requested requires authorization and the sender is not authorized</env:Text>
</env:Reason>
</env:Fault>
</env:Body>
I'm creating SOAP request like in official ONVIF documentation (pages 35-36). http://www.onvif.org/Portals/0/documents/WhitePapers/ONVIF_WG-APG-Application_Programmer's_Guide.pdf. "admin" and "12345" - are login and password from our test web cam.
It's my code where I try to send request down below:
HttpClient httpClient = new HttpClient();
var byteArray = Encoding.UTF8.GetBytes("admin:12345");
var request = requestStructure.CreateSoapRequest();
httpClient.DefaultRequestHeaders.Add("SOAPACTION", "\"" + requestStructure.actionNamespace + "#" + requestStructure.actionName + "\"");
httpClient.DefaultRequestHeaders.Add("Authorization", "Digest " + Convert.ToBase64String(byteArray));
var resp = await httpClient.PostAsync(requestedUri, new StringContent(request, UnicodeEncoding.UTF8));
var respString = await resp.Content.ReadAsStringAsync();
It's my SOAP request that created and returned by CreateSoapRequest():
public string CreateSoapRequest()
{
var nonce64 = Convert.ToBase64String(Encoding.UTF8.GetBytes(this.nonce.ToString()));
var date64 = Convert.ToBase64String(Encoding.UTF8.GetBytes(this.dateCreated));
var password64 = Convert.ToBase64String(Encoding.UTF8.GetBytes(this.password));
SHA1 sha = new SHA1CryptoServiceProvider();
var passwordDigest = sha.ComputeHash(Encoding.UTF8.GetBytes(nonce64 + date64 + password64));
password64 = Convert.ToBase64String(passwordDigest);
this.requestBodyString =
"<soap:Envelope "
+ "xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\" "
+ "soap:encodingStyle=\"http://schemas.xmlsoap.org/soap/encoding/\">"
+ "<soap:Header>"
+ "<Security s:mustUnderstand=\"1\" xmlns:w=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd\">"
+ "<UsernameToken>"
+ "<Username>" + this.login + "</Username>"
+ "<Password Type=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordDigest\">" + password64 + "</Password>"
+ "<Nonce EncodingType=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary\">" + nonce64 + "</Nonce>"
+ "<Created xmlns=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd\">" + this.dateCreated + "</Created>"
+ "</UsernameToken>"
+ "</Security>"
+ "</soap:Header>"
+ "<soap:Body>"
+ "<u:" + this.actionName + " "
+ "xmlns:u=\"" + this.actionNamespace + "\">"
+ this.actionParameters
+ "</u:" + this.actionName + ">"
+ "</soap:Body>" +
"</soap:Envelope>\r\n\r\n";
return this.requestBodyString;
}
Thanks for any help!

I have been dealing with this for a long time and here is the function I used to get all the authentication stuff:
static void GetPasswordDigest()
{
//Get nonce
Random rnd = new Random();
Byte[] nonce_b = new Byte[16];
rnd.NextBytes(nonce_b);
nonce64 = Convert.ToBase64String(nonce_b);
Console.WriteLine("Nonce: " + nonce64);
//Get timestamp
DateTime created = DateTime.Now;
creationtime = created.ToString("yyyy-MM-ddTHH:mm:ssZ");
Byte[] creationtime_b = Encoding.ASCII.GetBytes(creationtime);
Console.WriteLine("Timestamp: " + creationtime);
//Convert the plain password to bytes
Byte[] password_b = Encoding.ASCII.GetBytes(ONVIFPassword);
//Concatenate nonce_b + creationtime_b + password_b
Byte[] concatenation_b = new byte[nonce_b.Length + creationtime_b.Length + password_b.Length];
System.Buffer.BlockCopy(nonce_b, 0, concatenation_b, 0, nonce_b.Length);
System.Buffer.BlockCopy(creationtime_b, 0, concatenation_b, nonce_b.Length, creationtime_b.Length);
System.Buffer.BlockCopy(password_b, 0, concatenation_b, nonce_b.Length + creationtime_b.Length, password_b.Length);
//Apply SHA1 on the concatenation
SHA1 sha = new SHA1CryptoServiceProvider();
Byte[] pdresult = sha.ComputeHash(concatenation_b);
passworddigest = Convert.ToBase64String(pdresult);
Console.WriteLine("Password digest: " + passworddigest);
}
I hope this hepls.

I've been doing a lot of Onvif stuff recently and found that setting up the security credentials is quite fiddly.
First I would say make sure your date format is like the following:
var now = DateTime.Now.ToUniversalTime().ToString("yyyy-MM-ddThh:mm:ss.fffZ");
The only other difference with mine ( which works fine) is that I have an extra line in the header:
string xml = string.Format(#"<?xml version='1.0' encoding='UTF-8'?>"+
"<s:Envelope xmlns:s='http://www.w3.org/2003/05/soap-envelope'>" +
"<s:Header>" +
"<Security s:mustUnderstand='1' xmlns='http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd'>" +
"<UsernameToken>" +
"<Username>{0}</Username>" +
"<Password Type='http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0#PasswordDigest'>" +
"{1}" +
"</Password>" +
"<Nonce EncodingType='http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary'>" +
"{2}" +
"</Nonce>" +
"<Created xmlns='http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd'>" +
"{3}" +
"</Created>" +
"</UsernameToken>" +
"</Security>" +
"</s:Header>", user, credentials[0], b64Nonce, credentials[2]);
Hope this helps!