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Calling a GraphQL API over HTTP

I was able to make a graphql POST from Postman by choosing "GraphQL" content type:
When I am trying to perform the POST from C#:
ServicePointManager.SecurityProtocol = (SecurityProtocolType)3072;
var myHttpWebRequest = (HttpWebRequest)WebRequest.Create(url);
myHttpWebRequest.Method = "POST";
myHttpWebRequest.ContentType = "application/graphql";
myHttpWebRequest.Headers.Add("Authorization", authToken);
var encoding = new ASCIIEncoding();
byte[] byte1 = encoding.GetBytes(postData);
myHttpWebRequest.ContentLength = byte1.Length;
var newStream = myHttpWebRequest.GetRequestStream();
newStream.Write(byte1, 0, byte1.Length);
using (var response = (HttpWebResponse)myHttpWebRequest.GetResponse())
{
using (var receiveStream = response.GetResponseStream())
{
using (StreamReader readStream = new StreamReader(receiveStream, Encoding.UTF8))
{
string strContent = readStream.ReadToEnd();
return strContent;
}
}
}
it looks the the content type is expected to be application/json even I specifically set content type to be "application/graphql" because the response I get is:
{"data":null,"errors":[{"message":"failed to recognize JSON request: 'invalid character 'q' looking for beginning of value'","path":null,"extensions":{"timestamp":"2021-05-19T16:04:23.091659509Z"}}]}
How can I rewrite this part as json?
query{
viewer{
accounts(filter: {accountTag: "accountTagHere"}){
ipFlows1mGroups(
limit:10
filter: {datetimeMinute_gt: "2021-05-19T16:00:00Z"}){
avg{bitsPerSecond}
}
}
}
}
This doens't work:
var postParams = #"{`query`:`viewer{accounts(filter: { accountTag: ...";
postParams = postParams.Replace("`", "\"");

If you use application/graphql, according to the original guidelines from Facebook here, the body of the POST should be the query and only the query, just as you've got in your Postman screenshot. You shouldn't need to encode it, just set the body using StringContent (assuming you're using HttpClient).
Another option though is to POST using application/json and then you need to post JSON of the form as shown on that page and below. (Note: make sure to use an operationName that matches the one in the query, or just not pass it if you've got only one and it's not named)
{
"query": "...",
"operationName": "...",
"variables": { "myVariable": "someValue", ... }
}
Finally, why not use a library that makes this easier for you? There's options for GraphQL C# client's.
StrawberryShake - Generates typed clients from .graphql files and can have a store backing it (think redux) that caches/syncs data, supports reactive concepts, etc. More here. There's even a VS extension that gives you intellisense when writing your queries.
graphql-dotnet/graphql-client - A simple wrapper around HttpClient

Google Drive insert file permission

I can't insert permission to a file with this code:
string URI = String.Format("https://www.googleapis.com/drive/v2/files/{0}/permissions&access_token={1}", fileId, "token");
var request = (HttpWebRequest)HttpWebRequest.Create(URI);
request.Method = "POST";
request.ContentType = "application/json";
string json = "{\"role\": \"reader\",\"type\": \"anyone\"}";
byte[] byteData = new System.Text.ASCIIEncoding().GetBytes(json);
request.ContentLength = byteData.Length;
using (var dataStream = request.GetRequestStream())
{
dataStream.Write(byteData, 0, byteData.Length);
}
var response = (HttpWebResponse)request.GetResponse();
using (var reader = new StreamReader(response.GetResponseStream()))
{
json = reader.ReadToEnd();
}
I al getting a 404 error. What's the problem?

string URI = String.Format("https://www.googleapis.com/drive/v2/files/{0}/permissions&access_token={1}", fileId, "token");
Access token is not a string "token" it must be a valid access token for the user who owns the file.
Update:
permissions?access_token={1}",
You should be using ? and not & to add a parameter to the url. Not even sure you can do it like that with a HTTP Post.
Added info:
If this is not simply a typo on your part you may want to read up on Authorization a little
I also recommend checking out the Google client library instead of writing this yourself. Google.Apis.Drive.v2 Client Library.
There is a newer version of the Google Drive API you might also be interested in looking at rather then writing new code for an older version of the API. Google Drive API v3.

Using google translate api POST method, returns 404

So basically I have some french text and want to traduce it in english using c#.
I'm using google translate api, which was working fine until i had a text.length > 1000 .... then I realized that I must use POST method.
Since I use the post method, it returns me 404.
btw i know the api is deprecated, I though it would be cool anyways but I'm starting to realize maybe i should use bing ?
string fromLanguage = "fr";
string toLanguage = "en";
String apiKey = "AIzasdfasdfJvWKNioZwLg-3kyYsm4_dao";
String apiUrl = "https://www.googleapis.com/language/translate/v2";
string tmpTranslatedContent = Translate(apiUrl, "salut la planete", apiKey, fromLanguage, toLanguage);
public string Translate(string url, string text, string key, string fromLanguage, string toLanguage)
{
PostSubmitter post = new PostSubmitter();
post.Url = url;
post.PostItems.Add("key", key);
post.PostItems.Add("source", fromLanguage);
post.PostItems.Add("target", toLanguage);
post.PostItems.Add("q", text);
post.Type = PostSubmitter.PostTypeEnum.Post;
string result = post.Post();
return result;
}
PostSubmitter is a class i found when searching google
Comments on the site are saying it works.....
the main part of the class looks like this
HttpWebRequest request=null;
if (m_type==PostTypeEnum.Post)
{
Uri uri = new Uri(url);
request = (HttpWebRequest) WebRequest.Create(uri);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = postData.Length;
using(Stream writeStream = request.GetRequestStream())
{
UTF8Encoding encoding = new UTF8Encoding();
byte[] bytes = encoding.GetBytes(postData);
writeStream.Write(bytes, 0, bytes.Length);
}
thanks.

This is a little old, but I just ran into a similar problem but with PHP instead of C# and the fix should be quite similar.
Basically, even though you are using POST, you still need to tell Google that from a REST point of view you are actually doing a GET. This can be done with the X-HTTP-Method-Override header, setting it to be: X-HTTP-Method-Override: GET
Google tells me that as ASP.NET MVC, version 2, there is a method HttpHelper.HttpMethodOverride that will allow you to do this.
According to the Google Translate API however, text is still limited to 5k even when posting.

getting this error: "The remote server returned an error: (422) Unprocessable Entity." when doing post from C# to RoR

This code is for an outlook plugin. We're trying to POST to a page and are getting this error:
The remote server returned an error: (422) Unprocessable Entity.
The C# code is here:
webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
ASCIIEncoding asciiEncoding = new System.Text.ASCIIEncoding();
Byte[] postData = asciiEncoding.GetBytes("email=e2#email.com&password=hunter2");
char[] resultHTML = asciiEncoding.GetChars(webClient.UploadData("http://url", "POST", postData));
string convertedResultHTML = new string(resultHTML);
Any idea what could be causing this?

POST data must be encoded prior to be sent out on the wire as ASCII, if you are sending character not in the ASCII range. You should try something like:
Byte[] postData = asciiEncoding.GetBytes(HttpUtility.UrlEncode("email=e2#email.com&password=hunter2"));

Because of its limited functionality, I avoid using WebClient and use WebRequest instead. The code below:
does not expect an HTTP 100 status code to be returned,
creates a CookieContainer to store any cookies we pick up,
sets the Content Length header, and
UrlEncodes each value in the post data.
Give the following a try and see if it works for you.
System.Net.ServicePointManager.Expect100Continue = false;
System.Net.CookieContainer cookies = new System.Net.CookieContainer();
// this first request just ensures we have a session cookie, if one exists
System.Net.WebRequest req = System.Net.WebRequest.Create("http://localhost/test.aspx");
((System.Net.HttpWebRequest)req).CookieContainer = cookies;
req.GetResponse().Close();
// this request submits the data to the server
req = System.Net.WebRequest.Create("http://localhost/test.aspx");
req.ContentType = "application/x-www-form-urlencoded";
req.Method = "POST";
((System.Net.HttpWebRequest)req).CookieContainer = cookies;
string parms = string.Format("email={0}&password={1}",
System.Web.HttpUtility.UrlEncode("e2#email.com"),
System.Web.HttpUtility.UrlEncode("hunter2"));
byte[] bytes = System.Text.Encoding.ASCII.GetBytes(parms);
req.ContentLength = bytes.Length;
// perform the POST
using (System.IO.Stream os = req.GetRequestStream())
{
os.Write(bytes, 0, bytes.Length);
}
// read the response
string response;
using (System.Net.WebResponse resp = req.GetResponse())
{
if (resp == null) return;
using (System.IO.StreamReader sr = new System.IO.StreamReader(resp.GetResponseStream()))
{
response = sr.ReadToEnd().Trim();
}
}
// the variable response holds the results of the request...
Credits: Hanselman, Simon (SO Question)

This is the RoR application telling you that you have not formed a request that it can handle; the destination script exists (otherwise you'd see a 404), the request is being handled (otherwise you'd get a 400 error) and it's been encoded correctly (or you'd get a 415 error) but the actual instruction can't be carried out.
Looking at it, you seem to be loading some email information. The RoR application could be telling you that the username and password is wrong, or that the user doesn't exist, or something else. It's up to the RoR application itself.
I think the code itself is good; it's just that the app at the other end isn't happy about doing what you ask it. Are you missing something else in the request information, like a command? (eg command=getnetemails&email=e2#email.com&password=hunter2) Are you sure the email/password combination you are passing is good?
see here for more on the 422 error.

Add the below line above your code.
System.Net.ServicePointManager.Expect100Continue = false;
Are you trying to access an authentication required page?

it was solved by returning xml instead of just unstructured text on the RoR side

WebRequest to connect to the Wikipedia API

This may be a pathetically simple problem, but I cannot seem to format the post webrequest/response to get data from the Wikipedia API. I have posted my code below if anyone can help me see my problem.
string pgTitle = txtPageTitle.Text;
Uri address = new Uri("http://en.wikipedia.org/w/api.php");
HttpWebRequest request = WebRequest.Create(address) as HttpWebRequest;
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
string action = "query";
string query = pgTitle;
StringBuilder data = new StringBuilder();
data.Append("action=" + HttpUtility.UrlEncode(action));
data.Append("&query=" + HttpUtility.UrlEncode(query));
byte[] byteData = UTF8Encoding.UTF8.GetBytes(data.ToString());
request.ContentLength = byteData.Length;
using (Stream postStream = request.GetRequestStream())
{
postStream.Write(byteData, 0, byteData.Length);
}
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
// Get the response stream.
StreamReader reader = new StreamReader(response.GetResponseStream());
divWikiData.InnerText = reader.ReadToEnd();
}

You might want to try a GET request first because it's a little simpler (you will only need to POST for wikipedia login). For example, try to simulate this request:
http://en.wikipedia.org/w/api.php?action=query&prop=images&titles=Main%20Page
Here's the code:
HttpWebRequest myRequest =
(HttpWebRequest)WebRequest.Create("http://en.wikipedia.org/w/api.php?action=query&prop=images&titles=Main%20Page");
using (HttpWebResponse response = (HttpWebResponse)myRequest.GetResponse())
{
string ResponseText;
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
ResponseText = reader.ReadToEnd();
}
}
Edit: The other problem he was experiencing on the POST request was, The exception is : The remote server returned an error: (417) Expectation failed. It can be solved by setting:
System.Net.ServicePointManager.Expect100Continue = false;
(This is from: HTTP POST Returns Error: 417 "Expectation Failed.")

I'm currently in the final stages of implementing an C# MediaWiki API which allows the easy scripting of most MediaWiki viewing and editing actions.
The main API is here: http://o2platform.googlecode.com/svn/trunk/O2%20-%20All%20Active%20Projects/O2_XRules_Database/_Rules/APIs/OwaspAPI.cs and here is an example of the API in use:
var wiki = new O2MediaWikiAPI("http://www.o2platform.com/api.php");
wiki.login(userName, password);
var page = "Test"; // "Main_Page";
wiki.editPage(page,"Test content2");
var rawWikiText = wiki.raw(page);
var htmlText = wiki.html(page);
return rawWikiText.line().line() + htmlText;

You seem to be pushing the input data on HTTP POST, but it seems you should use HTTP GET.
From the MediaWiki API docs:
The API takes its input through
parameters in the query string. Every
module (and every action=query
submodule) has its own set of
parameters, which is listed in the
documentation and in action=help, and
can be retrieved through
action=paraminfo.
http://www.mediawiki.org/wiki/API:Data_formats