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  • Python: Getting INVALID response from PayPal's Sandbox IPN, slowly going insane...

    - by thepeanut
    Hi All I am trying to implement a simple online payment system using PayPal, however I have tried everything I know and am still getting an INVALID response. I know it's nothing too simple, because I get a VERIFIED response when using the IPN simulator. I have tried putting the items into a dict first, I have tried fixing the encoding, and still nothing. PayPal says the reasons for an INVALID response could be: Sending wrong items or in wrong order (pretty sure it's not this) Sending to the wrong address (definitely not this) Encoding items incorrectly (I dont think it's this, set encoding to UTF-8 on both paypal and my script) The following is the snippet concerned: f = cgi.FieldStorage() newparams = 'cmd=_notify-validate' for key in f.keys(): val = f[key].value newparams += '&' + urlencode({key: val.encode('utf-8')}) req = urllib2.Request(PP_URL, newparams) req.add_header("Content-type", "application/x-www-form-urlencoded") http = urllib2.urlopen(req) ret = http.read() fi.write(ret + '\n') if ret == 'VERIFIED': #*do stuff* Can anyone suggest anything I can do to fix this?! Cheers Sam

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  • How do I get the size of a response from a Spring 2.5 HTTP remoting call?

    - by aarestad
    I've been poking around the org.springframework.remoting.httpinvoker package in Spring 2.5 trying to find a way to get visibility into the size of the response, but I keep going around in circles. Via another question I saw here, I think what I want to do is get a handle on the InputStream that represents the response from the server, and then wrap it with an Apache commons-io CountingInputStream. What's the best way to go about doing this? For the moment, I'd be happy with just printing the size of the response to stdout, but eventually I want to store it in a well-known location in my app for optional display.

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  • Is there an easy way of obtaining the total page response time in ASP.Net?

    - by Earlz
    Hello, commonly on say PHP or other web frameworks getting the total response time is easy, just start the timer at the top of the file and stop it at the end. In ASP.Net there is the whole Page Lifecycle bit though so I'm not sure how to do this. I would like for this response time recording to take place in a master page and the response time show up in the footer of pages. What would be the best way of doing this? Is there something built in to ASP.Net for it? Is it even possible to include the OnRender time?

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  • Is there a built-in way to determine the size of a WCF response?

    - by jaminto
    Before a client gets the full payload of the web request, we'd like to first send it a measurement of the size of the response it will get. If the response will be too large, the client will present a message to the user giving them the option to abort the operation. We can write some custom code to preload the response on the server, determine the size, and then pass it on to the client, but we'd rather not if there's another way to do it. Does anyone know if WCF has any tricky way to do this? Or are there any free third party tools out there that will accomplish this? Thanks.

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  • Design Pattern for Server Emulator

    - by adisembiring
    I wanna build server socket emulator, but I want implement some design pattern there. I will described my case study that I have simplified like these: My Server Socket will always listen client socket. While some request message come from the client socket, the server emulator will response the client through the socket. the response is response code. '00' will describe request message processed successfully, and another response code expect '00' will describe there are some error while processing the message request. IN the server there are some UI, this UI contain check response parameter such as. response code timeout interval While the server want to response the client message, the response code taken from input parameter response form UI check the timeout interval, it will create sleep thread and the interval taken from timeout interval input from UI. I have implement the function, but I create it in one class. I feel it so sucks. Can you suggest me what class / interface that I must create to refactor my code.

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  • How do I fire an asynchronous call in asp classic and ignore the response?

    - by Hexate
    Here's the gist: I have a call I want to make in asp, and I do not care about the response. I just want to fire the call and I do not want the page to wait for the response. According to the documentation, it should look something like this: dim xmlhttp : set xmlhttp = Server.CreateObject("MSXML2.ServerXMLHTTP") xmlhttp.Open "POST", url, true '' setting the 'asynchronous' option to 'true' xmlhttp.setRequestHeader "Content-Type", "application/soap+xml; charset=utf-8" xmlhttp.setRequestHeader "Content-Length", Len(XMLData) xmlhttp.send XMLData This works peachy when calling synchronously, but when I flip the ansynchronous option to 'true', nothing fires. What I can gather from the internet is that users do something like the following: While xmlhttp.readyState <> 4 xmlhttp.waitForResponse 1000 Wend Am I crazy in that this does not really seem like an asynchrous call anymore though if you are waiting for a response? putting the line xmlhttp.waitForResponse 1 right after the send will cause the request to fire, but again, I don't want to wait a second. Any thoughts?

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  • How to set response header in JAX-RS so that user sees download popup for Excel?

    - by masato-san
    I wrote code that generate Excel file using REST JAX-RS and I confirmed that the generated Excel file is in GlassFish server directory. But my goal is when user click on the button (which generate Excel .xls), I want download popup to show up asking user whether to save or open the .xls file just like any other web services doing for downloading any type of files. According to my search, the step is: generate Excel .xls (DONE) write the excel to stream in JAX-RS file, set response header to something like, String fileName = "Blah_Report.xls"; response.setHeader("Content-Disposition", "attachment; filename=" + fileName); My question is I'm doing all of this in JAX-RS file and I don't have HttpServletResponse object available. According to the answer from Add Response Header to JAX-RS Webservice He says: You can inject a reference to the actual HttpServletResponse via the @Context annotation in your webservice and use addHeader() etc. to add your header. I can't really figure what exactly that means without sample code..

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  • Server Emulator Design Pattern

    - by adisembiring
    I wanna build server socket emulator, but I want implement some design pattern there. I will described my case study that I have simplified like these: My Server Socket will always listen client socket. While some request message come from the client socket, the server emulator will response the client through the socket. the response is response code. '00' will describe request message processed successfully, and another response code expect '00' will describe there are some error while processing the message request. IN the server there are some UI, this UI contain check response parameter such as. response code timeout interval While the server want to response the client message, the response code taken from input parameter response form UI check the timeout interval, it will create sleep thread and the interval taken from timeout interval input from UI. I have implement the function, but I create it in one class. I feel it so sucks. Can you suggest me what class / interface that I must create to refactor my code.

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  • XML XHR Request resultin in 0 stauts and empty response text.

    - by deepak
    I had another post for the same problem... I think I put the question in a wrong way.. Let me give more details: i have test.html in my c:\ drive and I have a local webserver runnin in qt, and i have some plugin written to that webserver which will get the request and send some response text "hello". in test.html i m making a xml xhr request which will make a GET request like localhost:8080/test which will return the text "hello" by that plugin. Now if I directly open test.html from C:\ it doesnt work, i mean i get response 4 and status 0, and response text nothing.. but the request is passing through webserver and plugin It works fine, when the test.html is put in the webserver pages directory.

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  • another approach to returning some thing to browser in mvc with ajax call instead of using response.

    - by Sadegh
    hi, i have one section in my mvc 2.0 project which doing some processes and after each, return some messages (string) with response.write(). and this messages returned to browser with bad format. i want to return messages to one specific HTML div and add each to end of contents of div tag. now how do this? this event after each procces raised and message returned to browser. public void OnProgressEvent(System.Object source, CustomEventArgs customEventArgs) { if (customEventArgs.Level > 5) { Response.Write(customEventArgs.Message + "<br />"); Response.Flush(); } }

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  • How do I post to a webservice and display the returned Response in MVC3 Razor Application?

    - by DavieDave
    I have need to call a webservice from an HTML helper extension I created (combinbation of Action and Image) and placed in the view as follows @Html.ActionImage("CallService", new { number = ViewBag.number, code = ViewBag.code, account = ViewBag.account, amount = ViewBag.amount }, "~/Content/sb_200x61.png", "Start the Process") I am making the action call and it calls the service and returns a string of the html response, but it doesn't look right. I am using the typical HttpWebRequest to do the POST Action in C# code. Here is the controller action code: public MvcHtmlString CallService(string number, string code, string account, decimal? amount) { string response = MyService.ServiceLayer.ClassName.callService(number, code, account, Convert.ToDecimal(amount); MvcHtmlString mstring = new MvcHtmlString(response); return mstring; } When it returns the string back it's looking like the all styling and js is removed. It that due to MvcHtmlString? Is there a better way to do this? Redirect somehow ?

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  • CSV file download ignored in ie8/9

    - by JBB
    I have some code in a button click event which gets a csv string from a hidden input and writes it to the response as a CSV file. This work fine in Chrome, Firefox, ie7, ie9 in quirks mode. However it does not work in ie8 or ie9 default. Looking at this in fiddler the csv is being written to the response but the another get request is being made immediately after and the page reloads. No file saving dialog appears. protected void btnCsvHidden_Click(object sender, EventArgs e) { var csv = csvString.Value; var filename = "Reporting"; Response.Clear(); Response.ClearHeaders(); Response.AddHeader("Cache-Control", "no-store, no-cache"); Response.AddHeader("content-disposition", "attachment; filename=\"" + filename + ".csv\""); Response.ContentType = "text/csv"; Response.Write(csv); Response.End(); }

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  • ASP.NET Create zip file for download: the compressed zipped folder is invalid or corrupted

    - by Jason Braswell
    string fileName = "test.zip"; string path = "c:\\temp\\"; string fullPath = path + fileName; FileInfo file = new FileInfo(fullPath); Response.Clear(); Response.ClearContent(); Response.ClearHeaders(); Response.Buffer = true; Response.AppendHeader("content-disposition", "attachment; filename=" + fileName ); Response.AppendHeader("content-length", file.Length.ToString()); Response.ContentType = "application/x-compressed"; Response.TransmitFile(fullPath); Response.Flush(); Response.End(); The actual zip file c:\temp\test.zip is good, valid, whatever you want to call it. When I navigate to the directory c:\temp\ and double-click on the test.zip file; it opens right up. My problem seems only to be with the download. The code above executes without any issue. A file download dialog is presented. I can chose to either save or open. If I try to open the file from the dialog, or save it and then open it. I get the following dialog message: The Compressed (zipped) Folder is invalid or corrupted. For Response.ContentType I've tried: application/x-compressed application/x-zip-compressed application/x-gzip-compresse application/octet-stream application/zip The zip file is being created with some prior code (that I'm sure is working fine due to my ability to open the created file directly) using: Ionic.zip http://www.codeplex.com/DotNetZip

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  • json parser empty result

    - by graybow
    I'm new in gwt and new in using firebug.I have valid json result from tesdb3.php {"item": [{"kode":"002","nama":"bambang gentolet"}, {"kode":"012","nama":"Algiz"}]} I add the xml with inherits name='com.google.gwt.json.JSON'/ inherits name="com.google.gwt.http.HTTP" / then i try to show it in the gwt with this code. public class Tesdb3 implements EntryPoint { String url= "http://localhost/phpmyadmin/tesdb3/datauser.php"; public void LoadData() throws RequestException{ RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, URL.encode(url)); builder.sendRequest(null, new RequestCallback(){ @Override public void onError(Request request, Throwable exception) { Window.alert("error " + exception); } public void onResponseReceived(Request request, Response response) { if (200 == response.getStatusCode()) { Window.alert("ok -" + response.getText() + "-" + response.getStatusCode()); } else { Window.alert("error2 -" + response.getText()+ response.getStatusText() + "-" + response.getStatusCode()); } } }); } public void onModuleLoad() { try { LoadData(); } catch (RequestException e) { e.printStackTrace(); } } } I run it in development mode. not hosted mode. My code didn't show any error. But the result in window alert is "error2 --OK-0". result Net from firebug is 7 request: get Tesdb3.html?gwt.codeserv = 200ok get Tesdb3.css = 200ok get tesdb3.nocache.js = 200ok get hosted.html?tesdb3 = aborted get standard.css = 304 not modified get hosted.html?tesdb3 = 403 not modified get datauser.php = 200ok my question is: Why the response status code is 0, and the response status text is 'OK'? there was no eror in json or java code. why response.getText is empty? Why i can't get any json result even a single character?

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  • Node.js Adventure - When Node Flying in Wind

    - by Shaun
    In the first post of this series I mentioned some popular modules in the community, such as underscore, async, etc.. I also listed a module named “Wind (zh-CN)”, which is created by one of my friend, Jeff Zhao (zh-CN). Now I would like to use a separated post to introduce this module since I feel it brings a new async programming style in not only Node.js but JavaScript world. If you know or heard about the new feature in C# 5.0 called “async and await”, or you learnt F#, you will find the “Wind” brings the similar async programming experience in JavaScript. By using “Wind”, we can write async code that looks like the sync code. The callbacks, async stats and exceptions will be handled by “Wind” automatically and transparently.   What’s the Problem: Dense “Callback” Phobia Let’s firstly back to my second post in this series. As I mentioned in that post, when we wanted to read some records from SQL Server we need to open the database connection, and then execute the query. In Node.js all IO operation are designed as async callback pattern which means when the operation was done, it will invoke a function which was taken from the last parameter. For example the database connection opening code would be like this. 1: sql.open(connectionString, function(error, conn) { 2: if(error) { 3: // some error handling code 4: } 5: else { 6: // connection opened successfully 7: } 8: }); And then if we need to query the database the code would be like this. It nested in the previous function. 1: sql.open(connectionString, function(error, conn) { 2: if(error) { 3: // some error handling code 4: } 5: else { 6: // connection opened successfully 7: conn.queryRaw(command, function(error, results) { 8: if(error) { 9: // failed to execute this command 10: } 11: else { 12: // records retrieved successfully 13: } 14: }; 15: } 16: }); Assuming if we need to copy some data from this database to another then we need to open another connection and execute the command within the function under the query function. 1: sql.open(connectionString, function(error, conn) { 2: if(error) { 3: // some error handling code 4: } 5: else { 6: // connection opened successfully 7: conn.queryRaw(command, function(error, results) { 8: if(error) { 9: // failed to execute this command 10: } 11: else { 12: // records retrieved successfully 13: target.open(targetConnectionString, function(error, t_conn) { 14: if(error) { 15: // connect failed 16: } 17: else { 18: t_conn.queryRaw(copy_command, function(error, results) { 19: if(error) { 20: // copy failed 21: } 22: else { 23: // and then, what do you want to do now... 24: } 25: }; 26: } 27: }; 28: } 29: }; 30: } 31: }); This is just an example. In the real project the logic would be more complicated. This means our application might be messed up and the business process will be fragged by many callback functions. I would like call this “Dense Callback Phobia”. This might be a challenge how to make code straightforward and easy to read, something like below. 1: try 2: { 3: // open source connection 4: var s_conn = sqlConnect(s_connectionString); 5: // retrieve data 6: var results = sqlExecuteCommand(s_conn, s_command); 7: 8: // open target connection 9: var t_conn = sqlConnect(t_connectionString); 10: // prepare the copy command 11: var t_command = getCopyCommand(results); 12: // execute the copy command 13: sqlExecuteCommand(s_conn, t_command); 14: } 15: catch (ex) 16: { 17: // error handling 18: }   What’s the Problem: Sync-styled Async Programming Similar as the previous problem, the callback-styled async programming model makes the upcoming operation as a part of the current operation, and mixed with the error handling code. So it’s very hard to understand what on earth this code will do. And since Node.js utilizes non-blocking IO mode, we cannot invoke those operations one by one, as they will be executed concurrently. For example, in this post when I tried to copy the records from Windows Azure SQL Database (a.k.a. WASD) to Windows Azure Table Storage, if I just insert the data into table storage one by one and then print the “Finished” message, I will see the message shown before the data had been copied. This is because all operations were executed at the same time. In order to make the copy operation and print operation executed synchronously I introduced a module named “async” and the code was changed as below. 1: async.forEach(results.rows, 2: function (row, callback) { 3: var resource = { 4: "PartitionKey": row[1], 5: "RowKey": row[0], 6: "Value": row[2] 7: }; 8: client.insertEntity(tableName, resource, function (error) { 9: if (error) { 10: callback(error); 11: } 12: else { 13: console.log("entity inserted."); 14: callback(null); 15: } 16: }); 17: }, 18: function (error) { 19: if (error) { 20: error["target"] = "insertEntity"; 21: res.send(500, error); 22: } 23: else { 24: console.log("all done."); 25: res.send(200, "Done!"); 26: } 27: }); It ensured that the “Finished” message will be printed when all table entities had been inserted. But it cannot promise that the records will be inserted in sequence. It might be another challenge to make the code looks like in sync-style? 1: try 2: { 3: forEach(row in rows) { 4: var entity = { /* ... */ }; 5: tableClient.insert(tableName, entity); 6: } 7:  8: console.log("Finished"); 9: } 10: catch (ex) { 11: console.log(ex); 12: }   How “Wind” Helps “Wind” is a JavaScript library which provides the control flow with plain JavaScript for asynchronous programming (and more) without additional pre-compiling steps. It’s available in NPM so that we can install it through “npm install wind”. Now let’s create a very simple Node.js application as the example. This application will take some website URLs from the command arguments and tried to retrieve the body length and print them in console. Then at the end print “Finish”. I’m going to use “request” module to make the HTTP call simple so I also need to install by the command “npm install request”. The code would be like this. 1: var request = require("request"); 2:  3: // get the urls from arguments, the first two arguments are `node.exe` and `fetch.js` 4: var args = process.argv.splice(2); 5:  6: // main function 7: var main = function() { 8: for(var i = 0; i < args.length; i++) { 9: // get the url 10: var url = args[i]; 11: // send the http request and try to get the response and body 12: request(url, function(error, response, body) { 13: if(!error && response.statusCode == 200) { 14: // log the url and the body length 15: console.log( 16: "%s: %d.", 17: response.request.uri.href, 18: body.length); 19: } 20: else { 21: // log error 22: console.log(error); 23: } 24: }); 25: } 26: 27: // finished 28: console.log("Finished"); 29: }; 30:  31: // execute the main function 32: main(); Let’s execute this application. (I made them in multi-lines for better reading.) 1: node fetch.js 2: "http://www.igt.com/us-en.aspx" 3: "http://www.igt.com/us-en/games.aspx" 4: "http://www.igt.com/us-en/cabinets.aspx" 5: "http://www.igt.com/us-en/systems.aspx" 6: "http://www.igt.com/us-en/interactive.aspx" 7: "http://www.igt.com/us-en/social-gaming.aspx" 8: "http://www.igt.com/support.aspx" Below is the output. As you can see the finish message was printed at the beginning, and the pages’ length retrieved in a different order than we specified. This is because in this code the request command, console logging command are executed asynchronously and concurrently. Now let’s introduce “Wind” to make them executed in order, which means it will request the websites one by one, and print the message at the end.   First of all we need to import the “Wind” package and make sure the there’s only one global variant named “Wind”, and ensure it’s “Wind” instead of “wind”. 1: var Wind = require("wind");   Next, we need to tell “Wind” which code will be executed asynchronously so that “Wind” can control the execution process. In this case the “request” operation executed asynchronously so we will create a “Task” by using a build-in helps function in “Wind” named Wind.Async.Task.create. 1: var requestBodyLengthAsync = function(url) { 2: return Wind.Async.Task.create(function(t) { 3: request(url, function(error, response, body) { 4: if(error || response.statusCode != 200) { 5: t.complete("failure", error); 6: } 7: else { 8: var data = 9: { 10: uri: response.request.uri.href, 11: length: body.length 12: }; 13: t.complete("success", data); 14: } 15: }); 16: }); 17: }; The code above created a “Task” from the original request calling code. In “Wind” a “Task” means an operation will be finished in some time in the future. A “Task” can be started by invoke its start() method, but no one knows when it actually will be finished. The Wind.Async.Task.create helped us to create a task. The only parameter is a function where we can put the actual operation in, and then notify the task object it’s finished successfully or failed by using the complete() method. In the code above I invoked the request method. If it retrieved the response successfully I set the status of this task as “success” with the URL and body length. If it failed I set this task as “failure” and pass the error out.   Next, we will change the main() function. In “Wind” if we want a function can be controlled by Wind we need to mark it as “async”. This should be done by using the code below. 1: var main = eval(Wind.compile("async", function() { 2: })); When the application is running, Wind will detect “eval(Wind.compile(“async”, function” and generate an anonymous code from the body of this original function. Then the application will run the anonymous code instead of the original one. In our example the main function will be like this. 1: var main = eval(Wind.compile("async", function() { 2: for(var i = 0; i < args.length; i++) { 3: try 4: { 5: var result = $await(requestBodyLengthAsync(args[i])); 6: console.log( 7: "%s: %d.", 8: result.uri, 9: result.length); 10: } 11: catch (ex) { 12: console.log(ex); 13: } 14: } 15: 16: console.log("Finished"); 17: })); As you can see, when I tried to request the URL I use a new command named “$await”. It tells Wind, the operation next to $await will be executed asynchronously, and the main thread should be paused until it finished (or failed). So in this case, my application will be pause when the first response was received, and then print its body length, then try the next one. At the end, print the finish message.   Finally, execute the main function. The full code would be like this. 1: var request = require("request"); 2: var Wind = require("wind"); 3:  4: var args = process.argv.splice(2); 5:  6: var requestBodyLengthAsync = function(url) { 7: return Wind.Async.Task.create(function(t) { 8: request(url, function(error, response, body) { 9: if(error || response.statusCode != 200) { 10: t.complete("failure", error); 11: } 12: else { 13: var data = 14: { 15: uri: response.request.uri.href, 16: length: body.length 17: }; 18: t.complete("success", data); 19: } 20: }); 21: }); 22: }; 23:  24: var main = eval(Wind.compile("async", function() { 25: for(var i = 0; i < args.length; i++) { 26: try 27: { 28: var result = $await(requestBodyLengthAsync(args[i])); 29: console.log( 30: "%s: %d.", 31: result.uri, 32: result.length); 33: } 34: catch (ex) { 35: console.log(ex); 36: } 37: } 38: 39: console.log("Finished"); 40: })); 41:  42: main().start();   Run our new application. At the beginning we will see the compiled and generated code by Wind. Then we can see the pages were requested one by one, and at the end the finish message was printed. Below is the code Wind generated for us. As you can see the original code, the output code were shown. 1: // Original: 2: function () { 3: for(var i = 0; i < args.length; i++) { 4: try 5: { 6: var result = $await(requestBodyLengthAsync(args[i])); 7: console.log( 8: "%s: %d.", 9: result.uri, 10: result.length); 11: } 12: catch (ex) { 13: console.log(ex); 14: } 15: } 16: 17: console.log("Finished"); 18: } 19:  20: // Compiled: 21: /* async << function () { */ (function () { 22: var _builder_$0 = Wind.builders["async"]; 23: return _builder_$0.Start(this, 24: _builder_$0.Combine( 25: _builder_$0.Delay(function () { 26: /* var i = 0; */ var i = 0; 27: /* for ( */ return _builder_$0.For(function () { 28: /* ; i < args.length */ return i < args.length; 29: }, function () { 30: /* ; i ++) { */ i ++; 31: }, 32: /* try { */ _builder_$0.Try( 33: _builder_$0.Delay(function () { 34: /* var result = $await(requestBodyLengthAsync(args[i])); */ return _builder_$0.Bind(requestBodyLengthAsync(args[i]), function (result) { 35: /* console.log("%s: %d.", result.uri, result.length); */ console.log("%s: %d.", result.uri, result.length); 36: return _builder_$0.Normal(); 37: }); 38: }), 39: /* } catch (ex) { */ function (ex) { 40: /* console.log(ex); */ console.log(ex); 41: return _builder_$0.Normal(); 42: /* } */ }, 43: null 44: ) 45: /* } */ ); 46: }), 47: _builder_$0.Delay(function () { 48: /* console.log("Finished"); */ console.log("Finished"); 49: return _builder_$0.Normal(); 50: }) 51: ) 52: ); 53: /* } */ })   How Wind Works Someone may raise a big concern when you find I utilized “eval” in my code. Someone may assume that Wind utilizes “eval” to execute some code dynamically while “eval” is very low performance. But I would say, Wind does NOT use “eval” to run the code. It only use “eval” as a flag to know which code should be compiled at runtime. When the code was firstly been executed, Wind will check and find “eval(Wind.compile(“async”, function”. So that it knows this function should be compiled. Then it utilized parse-js to analyze the inner JavaScript and generated the anonymous code in memory. Then it rewrite the original code so that when the application was running it will use the anonymous one instead of the original one. Since the code generation was done at the beginning of the application was started, in the future no matter how long our application runs and how many times the async function was invoked, it will use the generated code, no need to generate again. So there’s no significant performance hurt when using Wind.   Wind in My Previous Demo Let’s adopt Wind into one of my previous demonstration and to see how it helps us to make our code simple, straightforward and easy to read and understand. In this post when I implemented the functionality that copied the records from my WASD to table storage, the logic would be like this. 1, Open database connection. 2, Execute a query to select all records from the table. 3, Recreate the table in Windows Azure table storage. 4, Create entities from each of the records retrieved previously, and then insert them into table storage. 5, Finally, show message as the HTTP response. But as the image below, since there are so many callbacks and async operations, it’s very hard to understand my logic from the code. Now let’s use Wind to rewrite our code. First of all, of course, we need the Wind package. Then we need to include the package files into project and mark them as “Copy always”. Add the Wind package into the source code. Pay attention to the variant name, you must use “Wind” instead of “wind”. 1: var express = require("express"); 2: var async = require("async"); 3: var sql = require("node-sqlserver"); 4: var azure = require("azure"); 5: var Wind = require("wind"); Now we need to create some async functions by using Wind. All async functions should be wrapped so that it can be controlled by Wind which are open database, retrieve records, recreate table (delete and create) and insert entity in table. Below are these new functions. All of them are created by using Wind.Async.Task.create. 1: sql.openAsync = function (connectionString) { 2: return Wind.Async.Task.create(function (t) { 3: sql.open(connectionString, function (error, conn) { 4: if (error) { 5: t.complete("failure", error); 6: } 7: else { 8: t.complete("success", conn); 9: } 10: }); 11: }); 12: }; 13:  14: sql.queryAsync = function (conn, query) { 15: return Wind.Async.Task.create(function (t) { 16: conn.queryRaw(query, function (error, results) { 17: if (error) { 18: t.complete("failure", error); 19: } 20: else { 21: t.complete("success", results); 22: } 23: }); 24: }); 25: }; 26:  27: azure.recreateTableAsync = function (tableName) { 28: return Wind.Async.Task.create(function (t) { 29: client.deleteTable(tableName, function (error, successful, response) { 30: console.log("delete table finished"); 31: client.createTableIfNotExists(tableName, function (error, successful, response) { 32: console.log("create table finished"); 33: if (error) { 34: t.complete("failure", error); 35: } 36: else { 37: t.complete("success", null); 38: } 39: }); 40: }); 41: }); 42: }; 43:  44: azure.insertEntityAsync = function (tableName, entity) { 45: return Wind.Async.Task.create(function (t) { 46: client.insertEntity(tableName, entity, function (error, entity, response) { 47: if (error) { 48: t.complete("failure", error); 49: } 50: else { 51: t.complete("success", null); 52: } 53: }); 54: }); 55: }; Then in order to use these functions we will create a new function which contains all steps for data copying. 1: var copyRecords = eval(Wind.compile("async", function (req, res) { 2: try { 3: } 4: catch (ex) { 5: console.log(ex); 6: res.send(500, "Internal error."); 7: } 8: })); Let’s execute steps one by one with the “$await” keyword introduced by Wind so that it will be invoked in sequence. First is to open the database connection. 1: var copyRecords = eval(Wind.compile("async", function (req, res) { 2: try { 3: // connect to the windows azure sql database 4: var conn = $await(sql.openAsync(connectionString)); 5: console.log("connection opened"); 6: } 7: catch (ex) { 8: console.log(ex); 9: res.send(500, "Internal error."); 10: } 11: })); Then retrieve all records from the database connection. 1: var copyRecords = eval(Wind.compile("async", function (req, res) { 2: try { 3: // connect to the windows azure sql database 4: var conn = $await(sql.openAsync(connectionString)); 5: console.log("connection opened"); 6: // retrieve all records from database 7: var results = $await(sql.queryAsync(conn, "SELECT * FROM [Resource]")); 8: console.log("records selected. count = %d", results.rows.length); 9: } 10: catch (ex) { 11: console.log(ex); 12: res.send(500, "Internal error."); 13: } 14: })); After recreated the table, we need to create the entities and insert them into table storage. 1: var copyRecords = eval(Wind.compile("async", function (req, res) { 2: try { 3: // connect to the windows azure sql database 4: var conn = $await(sql.openAsync(connectionString)); 5: console.log("connection opened"); 6: // retrieve all records from database 7: var results = $await(sql.queryAsync(conn, "SELECT * FROM [Resource]")); 8: console.log("records selected. count = %d", results.rows.length); 9: if (results.rows.length > 0) { 10: // recreate the table 11: $await(azure.recreateTableAsync(tableName)); 12: console.log("table created"); 13: // insert records in table storage one by one 14: for (var i = 0; i < results.rows.length; i++) { 15: var entity = { 16: "PartitionKey": results.rows[i][1], 17: "RowKey": results.rows[i][0], 18: "Value": results.rows[i][2] 19: }; 20: $await(azure.insertEntityAsync(tableName, entity)); 21: console.log("entity inserted"); 22: } 23: } 24: } 25: catch (ex) { 26: console.log(ex); 27: res.send(500, "Internal error."); 28: } 29: })); Finally, send response back to the browser. 1: var copyRecords = eval(Wind.compile("async", function (req, res) { 2: try { 3: // connect to the windows azure sql database 4: var conn = $await(sql.openAsync(connectionString)); 5: console.log("connection opened"); 6: // retrieve all records from database 7: var results = $await(sql.queryAsync(conn, "SELECT * FROM [Resource]")); 8: console.log("records selected. count = %d", results.rows.length); 9: if (results.rows.length > 0) { 10: // recreate the table 11: $await(azure.recreateTableAsync(tableName)); 12: console.log("table created"); 13: // insert records in table storage one by one 14: for (var i = 0; i < results.rows.length; i++) { 15: var entity = { 16: "PartitionKey": results.rows[i][1], 17: "RowKey": results.rows[i][0], 18: "Value": results.rows[i][2] 19: }; 20: $await(azure.insertEntityAsync(tableName, entity)); 21: console.log("entity inserted"); 22: } 23: // send response 24: console.log("all done"); 25: res.send(200, "All done!"); 26: } 27: } 28: catch (ex) { 29: console.log(ex); 30: res.send(500, "Internal error."); 31: } 32: })); If we compared with the previous code we will find now it became more readable and much easy to understand. It’s very easy to know what this function does even though without any comments. When user go to URL “/was/copyRecords” we will execute the function above. The code would be like this. 1: app.get("/was/copyRecords", function (req, res) { 2: copyRecords(req, res).start(); 3: }); And below is the logs printed in local compute emulator console. As we can see the functions executed one by one and then finally the response back to me browser.   Scaffold Functions in Wind Wind provides not only the async flow control and compile functions, but many scaffold methods as well. We can build our async code more easily by using them. I’m going to introduce some basic scaffold functions here. In the code above I created some functions which wrapped from the original async function such as open database, create table, etc.. All of them are very similar, created a task by using Wind.Async.Task.create, return error or result object through Task.complete function. In fact, Wind provides some functions for us to create task object from the original async functions. If the original async function only has a callback parameter, we can use Wind.Async.Binding.fromCallback method to get the task object directly. For example the code below returned the task object which wrapped the file exist check function. 1: var Wind = require("wind"); 2: var fs = require("fs"); 3:  4: fs.existsAsync = Wind.Async.Binding.fromCallback(fs.exists); In Node.js a very popular async function pattern is that, the first parameter in the callback function represent the error object, and the other parameters is the return values. In this case we can use another build-in function in Wind named Wind.Async.Binding.fromStandard. For example, the open database function can be created from the code below. 1: sql.openAsync = Wind.Async.Binding.fromStandard(sql.open); 2:  3: /* 4: sql.openAsync = function (connectionString) { 5: return Wind.Async.Task.create(function (t) { 6: sql.open(connectionString, function (error, conn) { 7: if (error) { 8: t.complete("failure", error); 9: } 10: else { 11: t.complete("success", conn); 12: } 13: }); 14: }); 15: }; 16: */ When I was testing the scaffold functions under Wind.Async.Binding I found for some functions, such as the Azure SDK insert entity function, cannot be processed correctly. So I personally suggest writing the wrapped method manually.   Another scaffold method in Wind is the parallel tasks coordination. In this example, the steps of open database, retrieve records and recreated table should be invoked one by one, but it can be executed in parallel when copying data from database to table storage. In Wind there’s a scaffold function named Task.whenAll which can be used here. Task.whenAll accepts a list of tasks and creates a new task. It will be returned only when all tasks had been completed, or any errors occurred. For example in the code below I used the Task.whenAll to make all copy operation executed at the same time. 1: var copyRecordsInParallel = eval(Wind.compile("async", function (req, res) { 2: try { 3: // connect to the windows azure sql database 4: var conn = $await(sql.openAsync(connectionString)); 5: console.log("connection opened"); 6: // retrieve all records from database 7: var results = $await(sql.queryAsync(conn, "SELECT * FROM [Resource]")); 8: console.log("records selected. count = %d", results.rows.length); 9: if (results.rows.length > 0) { 10: // recreate the table 11: $await(azure.recreateTableAsync(tableName)); 12: console.log("table created"); 13: // insert records in table storage in parallal 14: var tasks = new Array(results.rows.length); 15: for (var i = 0; i < results.rows.length; i++) { 16: var entity = { 17: "PartitionKey": results.rows[i][1], 18: "RowKey": results.rows[i][0], 19: "Value": results.rows[i][2] 20: }; 21: tasks[i] = azure.insertEntityAsync(tableName, entity); 22: } 23: $await(Wind.Async.Task.whenAll(tasks)); 24: // send response 25: console.log("all done"); 26: res.send(200, "All done!"); 27: } 28: } 29: catch (ex) { 30: console.log(ex); 31: res.send(500, "Internal error."); 32: } 33: })); 34:  35: app.get("/was/copyRecordsInParallel", function (req, res) { 36: copyRecordsInParallel(req, res).start(); 37: });   Besides the task creation and coordination, Wind supports the cancellation solution so that we can send the cancellation signal to the tasks. It also includes exception solution which means any exceptions will be reported to the caller function.   Summary In this post I introduced a Node.js module named Wind, which created by my friend Jeff Zhao. As you can see, different from other async library and framework, adopted the idea from F# and C#, Wind utilizes runtime code generation technology to make it more easily to write async, callback-based functions in a sync-style way. By using Wind there will be almost no callback, and the code will be very easy to understand. Currently Wind is still under developed and improved. There might be some problems but the author, Jeff, should be very happy and enthusiastic to learn your problems, feedback, suggestion and comments. You can contact Jeff by - Email: [email protected] - Group: https://groups.google.com/d/forum/windjs - GitHub: https://github.com/JeffreyZhao/wind/issues   Source code can be download here.   Hope this helps, Shaun All documents and related graphics, codes are provided "AS IS" without warranty of any kind. Copyright © Shaun Ziyan Xu. This work is licensed under the Creative Commons License.

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  • django: failing tests from django.contrib.auth

    - by gruszczy
    When I run my django test I get following errors, that are outside of my test suite: ====================================================================== ERROR: test_known_user (django.contrib.auth.tests.remote_user.RemoteUserCustomTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 160, in test_known_user super(RemoteUserCustomTest, self).test_known_user() File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 67, in test_known_user self.assertEqual(response.context['user'].username, 'knownuser') TypeError: 'NoneType' object is unsubscriptable ====================================================================== ERROR: test_last_login (django.contrib.auth.tests.remote_user.RemoteUserCustomTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 87, in test_last_login self.assertNotEqual(default_login, response.context['user'].last_login) TypeError: 'NoneType' object is unsubscriptable ====================================================================== ERROR: test_no_remote_user (django.contrib.auth.tests.remote_user.RemoteUserCustomTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 33, in test_no_remote_user self.assert_(isinstance(response.context['user'], AnonymousUser)) TypeError: 'NoneType' object is unsubscriptable ====================================================================== ERROR: test_unknown_user (django.contrib.auth.tests.remote_user.RemoteUserCustomTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 168, in test_unknown_user super(RemoteUserCustomTest, self).test_unknown_user() File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 51, in test_unknown_user self.assertEqual(response.context['user'].username, 'newuser') TypeError: 'NoneType' object is unsubscriptable ====================================================================== ERROR: test_known_user (django.contrib.auth.tests.remote_user.RemoteUserNoCreateTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 67, in test_known_user self.assertEqual(response.context['user'].username, 'knownuser') TypeError: 'NoneType' object is unsubscriptable ====================================================================== ERROR: test_last_login (django.contrib.auth.tests.remote_user.RemoteUserNoCreateTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 87, in test_last_login self.assertNotEqual(default_login, response.context['user'].last_login) TypeError: 'NoneType' object is unsubscriptable ====================================================================== ERROR: test_no_remote_user (django.contrib.auth.tests.remote_user.RemoteUserNoCreateTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 33, in test_no_remote_user self.assert_(isinstance(response.context['user'], AnonymousUser)) TypeError: 'NoneType' object is unsubscriptable ====================================================================== ERROR: test_unknown_user (django.contrib.auth.tests.remote_user.RemoteUserNoCreateTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 118, in test_unknown_user self.assert_(isinstance(response.context['user'], AnonymousUser)) TypeError: 'NoneType' object is unsubscriptable ====================================================================== ERROR: test_known_user (django.contrib.auth.tests.remote_user.RemoteUserTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 67, in test_known_user self.assertEqual(response.context['user'].username, 'knownuser') TypeError: 'NoneType' object is unsubscriptable ====================================================================== ERROR: test_last_login (django.contrib.auth.tests.remote_user.RemoteUserTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 87, in test_last_login self.assertNotEqual(default_login, response.context['user'].last_login) TypeError: 'NoneType' object is unsubscriptable ====================================================================== ERROR: test_no_remote_user (django.contrib.auth.tests.remote_user.RemoteUserTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 33, in test_no_remote_user self.assert_(isinstance(response.context['user'], AnonymousUser)) TypeError: 'NoneType' object is unsubscriptable ====================================================================== ERROR: test_unknown_user (django.contrib.auth.tests.remote_user.RemoteUserTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/remote_user.py", line 51, in test_unknown_user self.assertEqual(response.context['user'].username, 'newuser') TypeError: 'NoneType' object is unsubscriptable ====================================================================== FAIL: test_current_site_in_context_after_login (django.contrib.auth.tests.views.LoginTest) ---------------------------------------------------------------------- Traceback (most recent call last): File "/usr/lib/pymodules/python2.6/django/contrib/auth/tests/views.py", line 190, in test_current_site_in_context_after_login self.assertEquals(response.status_code, 200) AssertionError: 302 != 200 Could anyone explain me, what am I doing wrong or what I should set to get those tests pass?

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  • sendmail function shows:Syntax error, command unrecognized. The server response was:

    - by Ranjana
    while sending mail from particular id i get this error,for rest of all id's its working fine, wat was the prob over here.. Syntax error, command unrecognized. The server response was: status code :0 stack trace: at System.Net.Mail.SmtpConnection.ConnectAndHandshakeAsyncResult.End(IAsyncResult result) at System.Net.Mail.SmtpClient.ConnectCallback(IAsyncResult result) Brief: System.Net.Mail.SmtpException: Syntax error, command unrecognized. The server response was: at System.Net.Mail.SmtpConnection.ConnectAndHandshakeAsyncResult.End(IAsyncResult result) at System.Net.Mail.SmtpClient.ConnectCallback(IAsyncResult result) pls help me out..

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  • Uploading file > 1 MB on Django admin gives 400 Bad Request response.

    - by ayaz
    I have a small Django (1.2.x) project deployed on Apache (2.x) via mod_wsgi (2.x). In the admin, if I upload a file < 1MB, I can get it through; however, for a file, say, 1.2MB in size, I get a 400 response from the server with "Error 400" in the body only. I am wondering why this is happening. As far as I can see, there is no LimitRequestBody set in Apache configuration. I have tried uploading with several browsers including: Firefox, Chrome, and Safari. In the log file for Apache, there is apparently no entry for requests that gave the 400 error response. This is strange. I should point out that the scenario where this is happening is thus: The project in question is deployed on two identical Apache servers (completely identical setup) that are behind a load balancer. On my development setup, of course, the problem does not surface. Any help with this will be very much appreciated.

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  • When are response headers created in ASP.NET web forms?

    - by Jones
    I read somewhere the you can't remove response headers once they've been added. Given that, I'm wondering where in a standard ASP.NET web forms application do response headers get added initially. For example, these: Date Fri, 23 Apr 2010 16:25:56 GMT Server Microsoft-IIS/6.0 X-Powered-By ASP.NET Cache-Control private And can I stop it from happening? Do subsequent headers override old headers? Does my question even make sense? Thanks.

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  • How set the response header's Cache-Control in Sitecore?

    - by user822211
    By default, it looks like Sitecore does not cache pages. In web.config, set this <setting name="DisableBrowserCaching" value="false"/> and create pipeline processor page.Response.Cache.SetExpires(DateTime.Now.AddSeconds(60)); page.Response.Cache.SetCacheability(HttpCacheability.Public); but it did not work, the repose head stays no-cache. By the way, I add the pipeline in the renderLayout, anyone knows? thanks!

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  • How do I configure Jetty (via jettyrunner) so that it names a character set in the Content-Type response header?

    - by Pointy
    I use Jetty (via the oh-so-handy Jetty Runner) for day-to-day web application testing. One thing I've recently stumbled on is the fact that I don't get a character set called out in the "Content-Type" response header all the time. I do get it in response to my application's XMLHttpRequest transactions, but not for plain old pages loaded by <a> links or whatever. I've read a little bit about how to set up a Jetty config file, but I've never been able to completely understand that; all servlet containers are complicated, and while Jetty is pretty simple it's just weird enough that I don't grok the overall idea. Thus, all I do to launch my app is to run the Jetty Runner .jar file with a couple of simple arguments to set up the port number and logfile path, and then I just give it the .war file to run. It works great — except for the missing character set :-) Anybody have a quick sample config file that might fix this? edit — oh if it matters, I'm running Jetty 7.0.0 RC3; I've also tried with a slightly newer version (still 7.something) with exactly the same issue. All my testing is on Ubuntu.

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