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  • Storing large json strings to database + hash

    - by Guy
    I need to store quiete large JSON data strings to the database. I am using gzip to compress the string and therefore BLOB MySQL data type to store it. However, only 5% of all the requests contain unique data and only unique data ought to be stored to the database. My approach is as follows. array_multisort data (array [a, b, c] is virtually the same as [a, c, b]). json_encode data (json_encode is faster than serialize; we need string array representation for the step 3). sha1 data (slower than md5, though less possible the collisions). Check if the hash exists in the database. 5.1 yes – do not insert the data. 5.2. no – gzip the data and store it along the hash. Is there anything about this (apart from storing JSON data to the database in the first place) that sounds fishy or should be done a different way? p.s. We are talking about a database with roughly 1kk unique records being created every month.

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  • Jquery .ajax async postback on C# UserControl

    - by tnriverfish
    I'm working on adding a todo list to a project system and would like to have the todo creation trigger a async postback to update the database. I'd really like to host this in a usercontrol so I can drop the todo list onto a project page, task page or stand alone todo list page. Here's what I have. User Control "TodoList.ascx" which lives in the Controls directory. The script that sits at the top of the UserControl. You can see where I started building jsonText to postback but when that didn't work I just tried posting back an empty data variable and removed the 'string[] items' variable from the AddTodo2 method. <script type="text/javascript"> $(document).ready(function() { // Add the page method call as an onclick handler for the div. $("#divAddButton").click(function() { var jsonText = JSON.stringify({ tdlId: 1, description: "test test test" }); //data: jsonText, $.ajax({ type: "POST", url: "TodoList.aspx/AddTodo2", data: "{}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(msg) { alert('retrieved'); $("#divAddButton").text(msg.d); }, error: function() { alert("error"); } }); }); });</script> The rest of the code on the ascx. <div class="divTodoList"> <asp:PlaceHolder ID="phTodoListCreate" runat="server"> <div class="divTLDetail"> <div>Description</div> <div><asp:TextBox ID="txtDescription" runat="server"></asp:TextBox></div> <div>Active</div> <div><asp:CheckBox ID="cbActive" runat="server" /></div> <div>Access Level</div> <div><asp:DropDownList ID="ddlAccessLevel" runat="server"></asp:DropDownList></div> </div> </asp:PlaceHolder> <asp:PlaceHolder ID="phTodoListDisplayHeader" runat="server"> <div id="divTLHeader"> <asp:HyperLink ID="hlHeader" runat="server"></asp:HyperLink> </div> </asp:PlaceHolder> <asp:PlaceHolder ID="phTodoListItems" runat="server"> <div class="divTLItems> <asp:Literal ID="litItems" runat="server"></asp:Literal> </div> </asp:PlaceHolder> <asp:PlaceHolder ID="phAddTodo" runat="server"> <div class="divTLAddItem"> <div id="divAddButton">Add Todo</div> <div id="divAddText"><asp:TextBox ID="txtNewTodo" runat="server"></asp:TextBox></div> </div> </asp:PlaceHolder> <asp:Label ID="lbTodoListId" runat="server" style="display:none;"></asp:Label></div> To test the idea I created a /TodoList.aspx page that lives in the root directory. <uc1:TodoList runat="server" ID="tdl1" TodoListId="1" ></uc1:TodoList> The cs for the todolist.aspx protected void Page_Load(object sender, EventArgs e) { SecurityManager sm = new SecurityManager(); sm.MemberLevelAccessCheck(MemberLevelKey.AreaAdmin); } public static string AddTodo2() { return "yea!"; } My hope is that I can have a control that can be used to display multiple todo lists and create a brand new todo list as well. When I click on the #divAddButton I can watch it build the postback in firebug but once it completes it runs the error portion by alerting 'error'. I can't see why. I'd really rather have the response method live inside the user control as well. Since I'll be dropping it on several pages to keep from having to go put a method on each individual page. Any help would be appreciated.

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  • How to make custom WCF error handler return JSON response with non-OK http code?

    - by John
    I'm implementing a RESTful web service using WCF and the WebHttpBinding. Currently I'm working on the error handling logic, implementing a custom error handler (IErrorHandler); the aim is to have it catch any uncaught exceptions thrown by operations and then return a JSON error object (including say an error code and error message - e.g. { "errorCode": 123, "errorMessage": "bla" }) back to the browser user along with an an HTTP code such as BadRequest, InteralServerError or whatever (anything other than 'OK' really). Here is the code I am using inside the ProvideFault method of my error handler: fault = Message.CreateMessage(version, "", errorObject, new DataContractJsonSerializer(typeof(ErrorMessage))); var wbf = new WebBodyFormatMessageProperty(WebContentFormat.Json); fault.Properties.Add(WebBodyFormatMessageProperty.Name, wbf); var rmp = new HttpResponseMessageProperty(); rmp.StatusCode = System.Net.HttpStatusCode.InternalServerError; rmp.Headers.Add(HttpRequestHeader.ContentType, "application/json"); fault.Properties.Add(HttpResponseMessageProperty.Name, rmp); -- This returns with Content-Type: application/json, however the status code is 'OK' instead of 'InternalServerError'. fault = Message.CreateMessage(version, "", errorObject, new DataContractJsonSerializer(typeof(ErrorMessage))); var wbf = new WebBodyFormatMessageProperty(WebContentFormat.Json); fault.Properties.Add(WebBodyFormatMessageProperty.Name, wbf); var rmp = new HttpResponseMessageProperty(); rmp.StatusCode = System.Net.HttpStatusCode.InternalServerError; //rmp.Headers.Add(HttpRequestHeader.ContentType, "application/json"); fault.Properties.Add(HttpResponseMessageProperty.Name, rmp); -- This returns with the correct status code, however the content-type is now XML. fault = Message.CreateMessage(version, "", errorObject, new DataContractJsonSerializer(typeof(ErrorMessage))); var wbf = new WebBodyFormatMessageProperty(WebContentFormat.Json); fault.Properties.Add(WebBodyFormatMessageProperty.Name, wbf); var response = WebOperationContext.Current.OutgoingResponse; response.ContentType = "application/json"; response.StatusCode = HttpStatusCode.InternalServerError; -- This returns with the correct status code and the correct content-type! The problem is that the http body now has the text 'Failed to load source for: http://localhost:7000/bla..' instead of the actual JSON data.. Any ideas? I'm considering using the last approach and just sticking the JSON in the HTTP StatusMessage header field instead of in the body, but this doesn't seem quite as nice?

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  • Add TOC to PDF from XML/JSON/file?

    - by Elias
    I currently have a PDF file without any ToC (for example, in Mac's Preview.app, I can't see the ToC in the sidebar). But I have the TOC in XML format, where there is a title and a pagenumber where that section starts. Is there any way I can add that TOC to my PDF file in a batch way? Since I have the TOC in XML, I can basically parse it in any possible way, so if there were a command line to add an TOC item to a PDF, I could also do that. Any ideas?

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  • Openlayers - Redraw() layer. Add / Remove layer.

    - by Ozaki
    TLDR: I have an Openlayers map with a layer called 'track' I want to remove track and add track back in. I have an image 'imageFeature' on a layer that rotates on load to the direction being set. I want it to update this rotation that is set in 'styleMap' on a layer called 'tracking'. I set the var 'stylemap' to apply the external image & rotation. The 'imageFeature' is added to the layer at the coords specified. 'imageFeature' is removed. 'imageFeature' is added again in its new location. Rotation is not applied.. As the 'styleMap' applies to the layer I think that I have to remove the layer and add it again rather than just the 'imageFeature' Layer: var tracking = new OpenLayers.Layer.GML("Tracking", "coordinates.json", { format: OpenLayers.Format.GeoJSON, styleMap: styleMap }); styleMap: var styleMap = new OpenLayers.StyleMap({ fillOpacity: 1, pointRadius: 10, rotation: heading, }); Now wrapped in a timed function the imageFeature: map.layers[3].addFeatures(new OpenLayers.Feature.Vector( new OpenLayers.Geometry.Point(longitude, latitude), {rotation: heading, type: parseInt(Math.random() * 3)} )); Type refers to a lookup of 1 of 3 images.: styleMap.addUniqueValueRules("default", "type", lookup); var lookup = { 0: {externalGraphic: "Image1.png", rotation: heading}, 1: {externalGraphic: "Image2.png", rotation: heading}, 2: {externalGraphic: "Image3.png", rotation: heading} } I have tried the 'redraw()' function: but it returns "tracking is undefined" or "map.layers[2]" is undefined. tracking.redraw(true); map.layers[2].redraw(true); Heading is a variable: from a JSON feed. var heading = 13.542; But so far can't get anything to work it will only rotate the image onload. The image will move in coordinates as it should though. So what am I doing wrong with the redraw function or how can I get this image to rotate live? Thanks in advance -Ozaki Add: I managed to get map.layers[2].redraw(true); to sucessfully redraw layer 2. But it still does not update the rotation. I am thinking because the stylemap is updating. But it runs through the style map every n sec, but no updates to rotation and the variable for heading is updating correctly if i put a watch on it in firebug.

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  • Make @JsonTypeInfo property optional

    - by Mark Peters
    I'm using @JsonTypeInfo to instruct Jackson to look in the @class property for concrete type information. However, sometimes I don't want to have to specify @class, particularly when the subtype can be inferred given the context. What's the best way to do that? Here's an example of the JSON: { "owner": {"name":"Dave"}, "residents":[ {"@class":"jacksonquestion.Dog","breed":"Greyhound"}, {"@class":"jacksonquestion.Human","name":"Cheryl"}, {"@class":"jacksonquestion.Human","name":"Timothy"} ] } and I'm trying to deserialize them into these classes (all in jacksonquestion.*): public class Household { private Human owner; private List<Animal> residents; public Human getOwner() { return owner; } public void setOwner(Human owner) { this.owner = owner; } public List<Animal> getResidents() { return residents; } public void setResidents(List<Animal> residents) { this.residents = residents; } } public class Animal {} public class Dog extends Animal { private String breed; public String getBreed() { return breed; } public void setBreed(String breed) { this.breed = breed; } } public class Human extends Animal { private String name; public String getName() { return name; } public void setName(String name) { this.name = name; } } using this config: @JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.PROPERTY, property = "@class") private static class AnimalMixin { } //... ObjectMapper objectMapper = new ObjectMapper(); objectMapper.getDeserializationConfig().addMixInAnnotations(Animal.class, AnimalMixin.class); Household household = objectMapper.readValue(json, Household.class); System.out.println(household); As you can see, the owner is declared as a Human, not an Animal, so I want to be able to omit @class and have Jackson infer the type as it normally would. When I run this though, I get org.codehaus.jackson.map.JsonMappingException: Unexpected token (END_OBJECT), expected FIELD_NAME: missing property '@class' that is to contain type id (for class jacksonquestion.Human) Since "owner" doesn't specify @class. Any ideas? One initial thought I had was to use @JsonTypeInfo on the property rather than the type. However, this cannot be leveraged to annotate the element type of a list.

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  • SlickGrid and asp.net sample or tutorial

    - by user322862
    Hi, I am a newbie using SlickGrid. I have searched some of the sample apps out there but I am still stumped. If anyone can refer a sample or tutorial on SlickGrid using Asp.Net doing the following: Get data via JSON Implement paging, sorting, searching Pass the selected rows key to code behind for processing or call a codebehind function passing the selected rows key. Any help would be appreciated. TIA, TE:-D

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  • Jackson Vs. Gson

    - by Null Pointer
    After searching through some existing libraries for JSON, I have finally ended up with these two: Jackson Google GSon I am a bit partial towards GSON, but word on the net is that GSon suffers from certain celestial performance issue. I am continuing my comparison, in the meanwhile I was looking for help to make up my mind.

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  • Jquery return multiple values in ajax call

    - by Scarface
    I have a jquery post function that returns a response on success after the click of a div. However, I would like to return multiple variables on success. Do I have to use JSON, and if so, is it possible to integrate it into the $.ajax function after success? $.ajax({ type: "POST", data: "action=favorite&username=" + username + "&topic_id=" + topic_id + "&token=" + token, url: "favorite.php", success: function(response) { } });

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  • JQuery: json to object?

    - by user305270
    var gallery = new TGallery([[{"image":{"updated_at":"2010-03-20T00:00:00Z","title":"dfgdfg","spam_reports":0,"by_profile_id":1,"comment_count":0,"id":1,"description":"htt","on_type":"profile","adult_reports":0,"on_id":1,"created_at":"2010-03-20T00:00:00Z"}]]); Then in the TGallery class I would like to convert the json object to a js object. thanks without a plugin if is possible... :)

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  • JQuery error: XML filter is applied to non-XML value (function (E, F) {return new (o.fn.init)(E, F);

    - by morpheous
    I am getting this slightly cryptic error message: XML filter is applied to non-XML value (function (E, F) {return new (o.fn.init)(E, F);}) when I run this code snippet function justDoIt(arg){ msg = arg.msg; if(arg.ok) jQuery.(".action-button").each(function(idx,el){jQuery(this).removeClass('enabled');} ); } arg is a JSON format response form the server. Anyone knows how to fix this?

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  • Cascading dropdownlist jQuery does not retain value on post back.

    - by John Smith
    I have two html select server control on an add data form page. the user selects a value in the first html select server control and then values are populated into the second html select server control with jquery. The problem is when a a user clicks the save button and the page posts back, the values are no longer in the drop down list populated by jQuery. The drop downlist is a html server control, shouldn't it retain the values on post-back? How can I retain the values and save the selected value to the database? $(document).ready(function() { $("#<%=ddlCourseWare.ClientID %>").change(function() { var courseWareId = this.value; try { $.ajax({ type: "POST", url: "Left_SubCategory.aspx/GetTabData", data: "{courseWareId:" + courseWareId + "}", contentType: "application/json; charset=utf-8", dataType: "json", success: function(data) { var result = json_parse(data.d); $("#<%=ddlTabType.ClientID %>")[0].innerHTML = ''; if (result.length > 0) { $.each(result, function(key, item) { $("#<%=ddlTabType.ClientID %>").append($("<option></option>").val(item.id).html(item.TabName)); }); } else { $("#<%=ddlTabType.ClientID %>").append($("<option></option>").val('0').html('--Select--')); } }, error: function(request, status, error) { alert(request.responseText); } }); } catch (ex) { alert(ex); } }); }); HTML <select id="ddlCourseWare" name="ddlCourseWare" runat="server" Width="230px" class="TextBox" Height="18px" > <select id="ddlTabType" name="ddlTabType" runat="server" Width="230px" class="TextBox" Height="18px" onchange="BindMainCat();"> <option>--Select--</option> </select> C# private void BindCourseWare() { ddlCourseWare.DataSource = courseWare.GetCourseWare(); ddlCourseWare.DataTextField = "CourseWareType"; ddlCourseWare.DataValueField = "id"; ddlCourseWare.DataBind(); ddlCourseWare.Items.Insert(0, "----Select Course Ware----"); } [WebMethod] public static string GetTabData(int courseWareId) { var result = new CourseWare().GetCourseTabByCoursewareId(courseWareId); JavaScriptSerializer json_tabs = new JavaScriptSerializer(); string jsonArray_tabs = json_tabs.Serialize(result); return jsonArray_tabs; } protected void btnSave_Click(object sender, EventArgs e) { int mainCategoryID1 = int.Parse(ddlTabType.Value); // not working int mainCategoryID2 = int.Parse(Request["ctl00$ContentPlaceHolder1$ddlTabType"]); // working but always return same value means the upper value (selected index 1) }

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  • How Do I code this in python with simplejson

    - by Spikie
    how do i code a python program that return a json element that look like this {1:{'name':foo,'age':xl} 2:{'name':vee,'age':xx} .... } What i meant is that i want return nested dictionaries What i hoped to accomplish is something like this var foo = 1.name # to the the value of name in the clientside I hope all this made sense .English is my second language thanks in advance

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  • How to use Django with GWT ?

    - by Mononofu
    So I know that I can communicate between those two using JSON, but I also know that I would have to manually recreate all Django objects in JS. Do you know of any tool or library that could help me do that? Or maybe even a better way of achieving the same goal? I only found these two: http://palantar.blogspot.com/2006/06/agad-tutorial-ish-sort-of-post.html http://stackoverflow.com/questions/990319/django-gwt-or-jquery But then I still would have to manually mirror my objects, which would violate DRY.

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  • Zen Code + jQuery

    - by Josh Cornstone
    Hi, I just read this article at Smashing Magazine (http://www.smashingmagazine.com/2009/11/21/zen-coding-a-new-way-to-write-html-code/) about Zen Code. Maybe there is any jQuery plugin for this? Might be good for json data inserting/templating.

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  • Get IP Address Information such as Country, LatLong, City using Google Maps Data API

    - by Nullstr1ng
    Can I use Google Maps Data API to get the IP Address informations such as Country, LatLong, City, etc. The result will be in JSON or XML format that I can parse through C#. Is there any C# Library for Google Maps Data API? I found this interesting site http://www.ipinfodb.com/ip_location_api_json.php this guys even offer their IP address location database http://ipinfodb.com/ip_database.php

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  • What does this javascript do?

    - by Rakesh Juyal
    I was adding recent videos gadget on my blog. In that widget i was supposed to add this line <script src="/feeds/posts/default?orderby=published&alt=json-in-script&callback=showrecentpostswiththumbs"> also, i added another script which was having the method showrecentpostswiththumbs [ used in callback ]. Please let me know what does above syntax do?

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  • Best format to submit an autocomplete?

    - by Keyo
    I'm seeking advice on best practice when submitting a varying amount of POST variables. Do I use JSON or some character separated list to merge all the values into one field or use a sequence of fields like 'autocomplete1', 'autocomplete2' and so on. Thanks in advance, Ben

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  • base 64 URL decode with Ruby/Rails?

    - by seth.vargo
    I am working with the Facebook API and Ruby on Rails and I'm trying to parse the JSON that comes back. The problem I'm running into is that Facebook base64URL encodes their data. There is no built-in base64URL decode for Ruby. For the difference between a base64 encoded and base64URL encoded, see wikipedia. How do I decode this using Ruby/Rails? Edit: Because some people have difficulty reading - base64 URL is DIFFERENT than base64

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  • [C#] How divide a string into array

    - by Ricky
    If I have the following plain string, how do I divide it into an array of three elements? {["a","English"],["b","US"],["c","Chinese"]} ["a","English"],["b","US"],["c","Chinese"] This problem is related to JSON string parsing, so I wonder if there is any API to faciliate the conversion.

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