I have a rest url provided by client , It looks something like www.baseurl/api// I couldn't get result if I try to consume it from console application getting error 503.
However I m able to browse it from my browser and it returns the proper json of Entity Details. Please help me with this.
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApp15
{
public class Class1
{
private const string URL = "www.baseurl/api/<EntityName>/<EntityID>";
static void Main(string[] args)
{
Class1.CreateObject();
}
private static void CreateObject()
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(URL);
request.Method = "GET";
request.ContentType = "application/json";
try
{
WebResponse webResponse = request.GetResponse();
using (Stream webStream = webResponse.GetResponseStream() ?? Stream.Null)
using (StreamReader responseReader = new StreamReader(webStream))
{
string response = responseReader.ReadToEnd();
Console.Out.WriteLine(response);
}
}
catch (Exception e)
{
Console.Out.WriteLine("-----------------");
Console.Out.WriteLine(e.Message);
}
}
}
}
Can some one please assist me with this webcrawler, I keep getting the error :
Cannot implicitly convert type
'System.Collections.Generic.ISt' to 'string.
This error is in line where it is String Links = GetNewLinks(Rstring);, can someone please help, here is my code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.IO;
using System.Text.RegularExpressions;
namespace Crawler
{
public partial class Crawler : Form
{
String Rstring;
public Crawler()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
WebRequest myWebRequest;
WebResponse myWebResponse;
String URL = txt1.Text;
myWebRequest = WebRequest.Create(URL);
myWebResponse = myWebRequest.GetResponse();
Stream streamResponse = myWebResponse.GetResponseStream();
StreamReader sreader = new StreamReader(streamResponse);
Rstring = sreader.ReadToEnd();
String Links = GetNewLinks(Rstring);
txt2.Text = Rstring;
txt3.Text = Links;
sreader.Close();
streamResponse.Close();
myWebResponse.Close();
}
public ISet<string> GetNewLinks(string content)
{
Regex regexL = new Regex("(?<=<a\\s*?href=(?:'|\"))[^'\"]*?(?=(?:'|\"))");
ISet<string> newLinks = new HashSet<string>();
foreach (var match in regexL.Matches(content))
{
if (!newLinks.Contains(match.ToString()))
newLinks.Add(match.ToString());
}
return newLinks;
}
}
}
GetNewLinks() returns a set of strings (ISet<String>), not one only. So if you want to assign to a single string (String Links) then you have to select a string from the set, e.g. using First().
I hope I ask in the correct way in here as it is my first in stackoverflow.
I am pretty new in C# and WP8, but I am working on a small project where I through my WP8 app login to my page and then my wish is to be able to, after the login, to somehow use the session/cookie from the login to navigate in a WebBrowser control through the other "protected" pages.
I have indeed searched the forums and the net, but I have not found the specific answer elsewhere.
Below I have my login session which works and "result" gives me the HTML of the page after login. But then I am a bit stuck...
Maybe there is a better/smarter/easier way?
Best Regards
Martin
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Shell;
using HTTPPost.Resources;
using System.IO;
using System.Text;
using System.Diagnostics;
using System.Text.RegularExpressions;
namespace HTTPPost
{
public partial class MainPage : PhoneApplicationPage
{
public MainPage()
{
InitializeComponent();
Loaded += new RoutedEventHandler(MainPage_Loaded);
}
void MainPage_Loaded(object sender, RoutedEventArgs e)
{
System.Uri myUri = new System.Uri("http://homepage.com/index.php");
HttpWebRequest myRequest = (HttpWebRequest)HttpWebRequest.Create(myUri);
myRequest.Method = "POST";
myRequest.ContentType = "application/x-www-form-urlencoded";
myRequest.BeginGetRequestStream(new AsyncCallback(GetRequestStreamCallback), myRequest);
}
void GetRequestStreamCallback(IAsyncResult callbackResult)
{
HttpWebRequest myRequest = (HttpWebRequest)callbackResult.AsyncState;
// End the stream request operation
Stream postStream = myRequest.EndGetRequestStream(callbackResult);
// Create the post data
string postData = "user=usernamepass=password";
byte[] byteArray = Encoding.UTF8.GetBytes(postData);
// Add the post data to the web request
postStream.Write(byteArray, 0, byteArray.Length);
postStream.Close();
// Start the web request
myRequest.BeginGetResponse(new AsyncCallback(GetResponsetStreamCallback), myRequest);
}
void GetResponsetStreamCallback(IAsyncResult callbackResult)
{
HttpWebRequest request = (HttpWebRequest)callbackResult.AsyncState;
HttpWebResponse response = (HttpWebResponse)request.EndGetResponse(callbackResult);
using (StreamReader httpWebStreamReader = new StreamReader(response.GetResponseStream()))
{
string result;
result = httpWebStreamReader.ReadToEnd();
MiniBrowser.NavigateToString(result);
Debug.WriteLine(result);
}
}
}
}
Well, there is lots of answers about getting and storing cookies, but I have a trick to avoid using them. The trick is to use same instance of WebClient for all requests on this page after login sequence. See my code:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
namespace SomeApp
{
public class WebRequests
{
//Making property of HttpClient
private static HttpClient _client;
public static HttpClient Client
{
get { return _client; }
set { _client = value; }
}
//method to download string from page
public static async Task<string> LoadPageAsync(string p)
{
if (Client == null)// that means we need to login to page
{
Client = await Login(Client);
}
return await Client.GetStringAsync(p);
}
// method for logging in
public static async Task<HttpClient> Login(HttpClient client)
{
client = new HttpClient();
var content = new FormUrlEncodedContent(new[]
{
new KeyValuePair<string, string>("email", "someone#example.com"),
new KeyValuePair<string, string>("password", "SoMePasSwOrD")
});
var response = await client.PostAsync("https://www.website.com/login.php", content);
return client;
}
var page1Html = await LoadPageAsync("https://www.website.com/page1.php");
}
}
After managing to load data to my Rails Server through c# (check here to know what i am talking about), i am now trying to upload a file to that same server, along with other data.
In Ruby, I am able to do this with the code :
require 'HTTMultiParty'
class ReceiptCreate
include HTTMultiParty
# Log to file
# debug_output File.new("httparty1.log", "w+")
base_uri "localhost:3000"
format :json
headers "Accept" => "application/json"
def initialize
end
def post(machine_serial,filepath,tag_number,token)
options = { body:
{receipt:
{tag_number:tag_number,
receipt_file: File.new(filepath),
ispaperduplicate:0
},
machine:
{serial_number: machine_serial,
safe_token: token
}
}
}
self.class.post('/receipts', options)
end
end
receipt = ReceiptCreate.new()
filename1 = "C:\\filename1.pdf"
filename2 = "C:\\filename2.pdf"
response=receipt.post("2803433",filename2,"p94tt7w","123")
puts response
an when I inspect the parameters on the rails server i see
Parameters: {"receipt"=>{"tag_number"=>"p94tt7w", "receipt_file"=>#<ActionDispatch::Http::UploadedFile:0x4183ea8 #original_filename="Invoice.pdf", #content_type="application/octet-stream", #headers="Content-Disposition: form-data; name=\"receipt[receipt_file]\"; filename=\"Invoice.pdf\"\r\nContent-Length: 11653\r\nContent-Type: application/octet-stream\r\nContent-Transfer-Encoding: binary\r\n", #tempfile=#<File:C:/Users/diogo/AppData/Local/Temp/RackMultipart20130103-18168-efiqia>>, "ispaperduplicate"=>"0"}, "machine"=>{"serial_number"=>"2803433", "safe_token"=>"123"}}
But if i try to do the same with my c# code below
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using RestSharp;
using System.Web.Script.Serialization;
using System.IO;
namespace RonRestClient
{
class templateRequest
{
public Receipt receipt;
public class Receipt
{
public float total;
public String tag_number;
public bool ispaperduplicate = true;
public byte[] receipt_file;
public Receipt(float total, String tagnr, string filepath)
{
this.total = total;
this.tag_number = tagnr;
this.receipt_file = File.ReadAllBytes(filepath);
}
};
public Machine machine;
public class Machine
{
public String serial_number;
public String safe_token;
public Machine(String machinenr, String safe_token)
{
this.serial_number = machinenr;
this.safe_token = safe_token;
}
};
}
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
string path = #"C:\filename2.pdf";
string tagnr = "p94tt7w";
string machinenr = "2803433";
string safe_token = "123";
float total = 100;
templateRequest req = new templateRequest();
req.receipt = new templateRequest.Receipt(total, tagnr, path);
req.machine = new templateRequest.Machine(machinenr, safe_token);
//string json_body = JsonConvert.SerializeObject(req);
//string json_body = new JavaScriptSerializer().Serialize(req);
//var json_body = "{\"receipt\" : {\"total\":"+total+", \"tag_number\":\""+tagnr+"\",\"ispaperduplicate\":true},\"machine\":{\"serial_number\": \""+machinenr+"\",\"safe_token\": \""+safe_token+"\"}}";
var client = new RestClient("http://localhost:3000/receipts");
var request = new RestRequest(Method.POST);
//set request Body
request.AddHeader("Content-type", "application/json");
request.AddHeader("Accept", "application/json");
request.RequestFormat = DataFormat.Json;
request.AddBody(req);
//request.AddParameter("application/json", json_body, ParameterType.RequestBody);
// easily add HTTP Headers
// add files to upload (works with compatible verbs)
//request.AddFile("receipt/receipt_file",path);
// execute the request
IRestResponse response = client.Execute(request);
var content = response.Content; // raw content as string
if(response.ErrorMessage !="") content += response.ErrorMessage;
response_box.Text = content;
}
}
}
I get this
Parameters: {"receipt"=>{"total"=>100, "tag_number"=>"p94tt7w", "ispaperduplicate"=>true, "receipt_file"=>[37, 80, [n3...nX], 10]}, "machine"=>{"serial_number"=>"2803433", "safe_token"=>"123"}}
This seems to mean basically that Restsharp just thinks that my file is just another field.
RestSharp seems to have a method to add files request.AddFile("receipt/receipt_file",path);, and i believe that this should probably be the way to go...but when i just try and add the file, i get an error message saying :
This property cannot be set after writing has started.
Do I need to set each attribute of the file separately?
EDIT
Meanwhile i found this post, changed my code to :
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using RestSharp;
using System.Web.Script.Serialization;
using System.IO;
using System.Net;
namespace RonRestClient
{
class templateRequest
{
public Receipt receipt;
public class Receipt
{
//public float total;
public String tag_number;
public bool ispaperduplicate = true;
//public byte[] receipt_file;
public Receipt(String tagnr)
{
//this.total = total;
this.tag_number = tagnr;
// this.receipt_file = File.ReadAllBytes(filepath);
}
};
public Machine machine;
public class Machine
{
public String serial_number;
public String safe_token;
public Machine(String machinenr, String safe_token)
{
this.serial_number = machinenr;
this.safe_token = safe_token;
}
};
}
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
string path = #"C:\filename2.pdf";
string tagnr = "p94tt7w";
string machinenr = "2803433";
string safe_token = "123";
float total = 100;
templateRequest req = new templateRequest();
req.receipt = new templateRequest.Receipt(tagnr);
req.machine = new templateRequest.Machine(machinenr, safe_token);
var request = new RestRequest("/receipts",Method.POST);
request.AddParameter("receipt[total]", total);
request.AddParameter("receipt[tag_number]", tagnr);
request.AddParameter("machine[serial_number]", machinenr);
request.AddParameter("machine[safe_token]", safe_token);
request.AddFile("receipt[receipt_file]", File.ReadAllBytes(path), "Invoice.pdf", "application/octet-stream");
// Add HTTP Headers
request.AddHeader("Content-type", "application/json");
request.AddHeader("Accept", "application/json");
request.RequestFormat = DataFormat.Json;
//set request Body
//request.AddBody(req);
// execute the request
//calling server with restClient
RestClient restClient = new RestClient("http://localhost:3000");
restClient.ExecuteAsync(request, (response) =>
{
if (response.StatusCode == HttpStatusCode.OK)
{
//upload successfull
MessageBox.Show("Upload completed succesfully...\n" + response.Content);
}
else
{
//error ocured during upload
MessageBox.Show(response.StatusCode + "\n" + response.StatusDescription);
}
});
}
}
}
and now am getting the parameters :
Parameters: {"receipt"=>{"total"=>"100", "tag_number"=>"p94tt7w", "receipt_file"=>#<ActionDispatch::Http::UploadedFile:0x3db42d8 #original_filename="Invoice.pdf", #content_type="application/octet-stream", #headers="Content-Disposition: form-data; name=\"receipt[receipt_file]\"; filename=\"Invoice.pdf\"\r\nContent-Type: application/octet-stream\r\n", #tempfile=#<File:C:/Users/diogo/AppData/Local/Temp/RackMultipart20130103-18168-9mbt3h>>}, "machine"=>{"serial_number"=>"2803433", "safe_token"=>"123"}}
Along with an HTTP 422 - Unprocessable Entity error.
If I am to compare these parameters with the ones that i have working from the ruby code, now the only difference seems to be that this last message does not have the Content-length and Content-Transfer-Encoding fields...
Do you have any idea on how i might add the attributes?
This was a fight... In the end I discovered two different ways of solving this problem. The irony of it, as so many of coding problems, was that all i had to do was setting the right parameters in first place...Just one missing parameter cost me more than 4 hours..
Both detailed below :
1 - Use RestSharp (the total field shouldn't be there, and the ispaperduplicate field was missing)
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using RestSharp;
using System.Web.Script.Serialization;
using System.IO;
using System.Net;
namespace RonRestClient
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
string path = #"C:\filename2.pdf";
//localhost settings
string requestHost = #"http://localhost:3000/receipts";
string tagnr = "p94tt7w";
string machinenr = "2803433";
string safe_token = "123";
// Do it with RestSharp
templateRequest req = new templateRequest();
req.receipt = new templateRequest.Receipt(tagnr);
req.machine = new templateRequest.Machine(machinenr, safe_token);
var request = new RestRequest("/receipts", Method.POST);
request.AddParameter("receipt[tag_number]", tagnr);
request.AddParameter("receipt[ispaperduplicate]", 0);
request.AddParameter("machine[serial_number]", machinenr);
request.AddParameter("machine[safe_token]", safe_token);
request.AddFile("receipt[receipt_file]", File.ReadAllBytes(path), Path.GetFileName(path), "application/octet-stream");
// Add HTTP Headers
request.AddHeader("Content-type", "application/json");
request.AddHeader("Accept", "application/json");
request.RequestFormat = DataFormat.Json;
//set request Body
//request.AddBody(req);
// execute the request
//calling server with restClient
RestClient restClient = new RestClient("http://localhost:3000");
restClient.ExecuteAsync(request, (response) =>
{
if (response.StatusCode == HttpStatusCode.OK)
{
//upload successfull
MessageBox.Show("Upload completed succesfully...\n" + response.Content);
}
else
{
//error ocured during upload
MessageBox.Show(response.StatusCode + "\n" + response.StatusDescription);
}
});
}
}
}
2 - Use FileStream with HttpWebRequest (thank you Clivant)
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using RestSharp;
using System.Web.Script.Serialization;
using System.IO;
using System.Net;
namespace RonRestClient
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
string path = #"C:\Projectos\My Training Samples\Adobe Sample\RBO1574.pdf";
//localhost settings
string requestHost = #"http://localhost:3000/receipts";
string tagnr = "p94tt7w";
string machinenr = "2803433";
string safe_token = "123";
FileStream fs1 = File.OpenRead(path);
long filesize = fs1.Length;
fs1.Close();
// Create a http request to the server endpoint that will pick up the
// file and file description.
HttpWebRequest requestToServerEndpoint =
(HttpWebRequest)WebRequest.Create(requestHost);
string boundaryString = "FFF3F395A90B452BB8BEDC878DDBD152";
string fileUrl = path;
// Set the http request header \\
requestToServerEndpoint.Method = WebRequestMethods.Http.Post;
requestToServerEndpoint.ContentType = "multipart/form-data; boundary=" + boundaryString;
requestToServerEndpoint.KeepAlive = true;
requestToServerEndpoint.Credentials = System.Net.CredentialCache.DefaultCredentials;
requestToServerEndpoint.Accept = "application/json";
// Use a MemoryStream to form the post data request,
// so that we can get the content-length attribute.
MemoryStream postDataStream = new MemoryStream();
StreamWriter postDataWriter = new StreamWriter(postDataStream);
// Include value from the tag_number text area in the post data
postDataWriter.Write("\r\n--" + boundaryString + "\r\n");
postDataWriter.Write("Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}",
"receipt[tag_number]",
tagnr);
// Include ispaperduplicate text area in the post data
postDataWriter.Write("\r\n--" + boundaryString + "\r\n");
postDataWriter.Write("Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}",
"receipt[ispaperduplicate]",
0);
// Include value from the machine number in the post data
postDataWriter.Write("\r\n--" + boundaryString + "\r\n");
postDataWriter.Write("Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}",
"machine[serial_number]",
machinenr);
// Include value from the machine token in the post data
postDataWriter.Write("\r\n--" + boundaryString + "\r\n");
postDataWriter.Write("Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}",
"machine[safe_token]",
safe_token);
// Include the file in the post data
postDataWriter.Write("\r\n--" + boundaryString + "\r\n");
postDataWriter.Write("Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n"
+ "Content-Length: \"{2}\"\r\n"
+ "Content-Type: application/octet-stream\r\n"
+ "Content-Transfer-Encoding: binary\r\n\r\n",
"receipt[receipt_file]",
Path.GetFileName(fileUrl),
filesize);
postDataWriter.Flush();
// Read the file
FileStream fileStream = new FileStream(fileUrl, FileMode.Open, FileAccess.Read);
byte[] buffer = new byte[1024];
int bytesRead = 0;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
postDataStream.Write(buffer, 0, bytesRead);
}
fileStream.Close();
postDataWriter.Write("\r\n--" + boundaryString + "--\r\n");
postDataWriter.Flush();
// Set the http request body content length
requestToServerEndpoint.ContentLength = postDataStream.Length;
// Dump the post data from the memory stream to the request stream
Stream s = requestToServerEndpoint.GetRequestStream();
postDataStream.WriteTo(s);
postDataStream.Close();
}
}
}
Does anyone have experience using the Facebook Developer Toolkit? I am trying to post something to a Facebook user's Wall, but can't figure out how to use the API? Could someone could give me an example or point me to some documentation on the API's usage?
I actually found documentation and samples to do what I was looking for here: http://facebooktoolkit.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=28001
EDIT:
After initializing the Facebook session I called the Stream.Publish() method on the API.
FacebookService.API.stream.publish(...);
I created a video tutorial showing how to do exactly this. Here is the link:
http://www.markhagan.me/Samples/Grant-Access-And-Post-As-Facebook-User-ASPNet
And here is the code:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Facebook;
namespace FBO
{
public partial class facebooksync : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
CheckAuthorization();
}
private void CheckAuthorization()
{
string app_id = "374961455917802";
string app_secret = "9153b340ee604f7917fd57c7ab08b3fa";
string scope = "publish_stream,manage_pages";
if (Request["code"] == null)
{
Response.Redirect(string.Format(
"https://graph.facebook.com/oauth/authorize?client_id={0}&redirect_uri={1}&scope={2}",
app_id, Request.Url.AbsoluteUri, scope));
}
else
{
Dictionary<string, string> tokens = new Dictionary<string, string>();
string url = string.Format("https://graph.facebook.com/oauth/access_token?client_id={0}&redirect_uri={1}&scope={2}&code={3}&client_secret={4}",
app_id, Request.Url.AbsoluteUri, scope, Request["code"].ToString(), app_secret);
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
StreamReader reader = new StreamReader(response.GetResponseStream());
string vals = reader.ReadToEnd();
foreach (string token in vals.Split('&'))
{
//meh.aspx?token1=steve&token2=jake&...
tokens.Add(token.Substring(0, token.IndexOf("=")),
token.Substring(token.IndexOf("=") + 1, token.Length - token.IndexOf("=") - 1));
}
}
string access_token = tokens["access_token"];
var client = new FacebookClient(access_token);
client.Post("/me/feed", new { message = "markhagan.me video tutorial" });
}
}
}
}
Bit late, but maybe it still helps others: http://facebooktoolkit.codeplex.com/Thread/View.aspx?ThreadId=75412