Twitterizer引发异常：反序列化对象时发生意外的令牌：整数

Question

I'm encountering a JSON (de)serialization exception when using Twitterizer 's LookUp method. The exception states:

Unexpected token when deserializing object: Integer

Here is roughly what my code looks like:

// Populates the lookup options, requests the user details and processes the results
private void LookUpFollowersWithoutDetail(List<Follower> followersWithoutDetail)
{
    LookupUsersOptions lookupOptions = new LookupUsersOptions();

    for (int index = 0; index < followersWithoutDetail.Count && index < 100; index++)
    {
        lookupOptions.UserIds.Add(followersWithoutDetail[index].UserId);
    }

    RequestResult result = GetUserDetails(lookupOptions);
    // process the results
}

The method that gets the user details looks like this:

// Performs the lookup and saves the users to the database
private RequestResult GetUserDetails(LookupUsersOptions lookupOptions)
{
    try
    {
        // Look up the followers
        TwitterResponse<TwitterUserCollection> userLookupResponse = 
            TwitterUser.Lookup(_tokens, lookupOptions); // <-- Throws Exception
        if (userLookupResponse.Result == RequestResult.Success)
        {
            SaveUserDetails(userLookupResponse);
        }
        return userLookupResponse.Result;
    }
    catch (Exception e)
    {
        Console.WriteLine("Exception in GetUserDetails: " + e.Message);
    }
    return RequestResult.Unknown;
}

I don't do anything fancy, I just put a bunch of integers (User Id's of the followers) in the lookup options and then I call the lookup method with those options. Most of the time the method works fine, but every once in a while I get the exception mentioned in the beginning of this post. Has anybody encountered a similar issue with Twitterizer and have they figured out a solution?

Update (for Ricky):

Here is the stack trace:

at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateAndPopulateObject(JsonReader reader, JsonObjectContract contract, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueProperty(JsonReader reader, JsonProperty property, Object target, Boolean gottenCurrentValue, Object currentValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue(JsonProperty property, JsonReader reader, Object target) at Newtonsoft.Js on.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateAndPopulateObject(JsonReader reader, JsonObjectContract contract, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueProperty(JsonReader reader, JsonProperty property, Object target, Boolean gottenCurrentValue, Object currentValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue(JsonProperty property, JsonReader reader, Object target) at Newtonsoft.Json.Serialization .JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateAndPopulateObject(JsonReader reader, JsonObjectContract contract, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueNonProperty(JsonReader reader, Type objectType, JsonContract contract) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateList(IWrappedCollection wrappedList, JsonReader reader, String reference, JsonArrayContract contract) at Newtonsoft.Json.Serialization.JsonSerializerInternalR eader.<>c_ DisplayClass1.b _0(IList l, Boolean isTemporaryListReference) at Newtonsoft.Json.Utilities.CollectionUtils.CreateAndPopulateList(Type listType, Action 2 populateList) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateAndPopulateList(JsonReader reader, String reference, JsonArrayContract contract) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateList(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue, String reference) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueNonProperty(JsonReader reader, Type objectType, JsonContract contract) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonSerializer.Deserialize(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings) at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings) at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value) at Twitterizer.Core.SerializationHelper 2 populateList) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateAndPopulateList(JsonReader reader, String reference, JsonArrayContract contract) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateList(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue, String reference) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueNonProperty(JsonReader reader, Type objectType, JsonContract contract) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonSerializer.Deserialize(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings) at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings) at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value) at Twitterizer.Core.SerializationHelper 1.Deserialize(Byte[] webResponseData, DeserializationHandler deserializationHandler) at Twitterizer.Core.TwitterCommand 1.ExecuteCommand() at Twitterizer.Core.CommandPerformer.PerformAction[T](ICommand 1 command) at Twitterizer.TwitterUser.Lookup(OAuthTokens tokens, LookupUsersOptions options) at OBFUSCATED.System.OBFUSCATED.GetUserDetails(LookupUsersOptions lookupOptions) in C:\\Users\\user\\Path\\To\\MyClass.cs:line 306

Here is the list of User Id's that were supplied when this exception occurred:

-       lookupOptions.UserIds   Count = 100 Twitterizer.TwitterIdCollection
        [0] 39026441    decimal
        [1] 360825202   decimal
        [2] 377779483   decimal
        [3] 77599652    decimal
        [4] 199504556   decimal
        [5] 15290529    decimal
        [6] 15293368    decimal
        [7] 15295132    decimal
        [8] 15295838    decimal
        [9] 15300610    decimal
        [10]    15307479    decimal
        [11]    15314695    decimal
        [12]    15315646    decimal
        [13]    15316087    decimal
        [14]    15322893    decimal
        [15]    15324552    decimal
        [16]    15325815    decimal
        [17]    15330982    decimal
        [18]    15332031    decimal
        [19]    15332318    decimal
        [20]    15336542    decimal
        [21]    15338843    decimal
        [22]    15340130    decimal
        [23]    15341396    decimal
        [24]    15341681    decimal
        [25]    15342905    decimal
        [26]    15343278    decimal
        [27]    15351598    decimal
        [28]    15358123    decimal
        [29]    15361196    decimal
        [30]    15361723    decimal
        [31]    15363684    decimal
        [32]    15365834    decimal
        [33]    15366588    decimal
        [34]    15375866    decimal
        [35]    15377256    decimal
        [36]    15384679    decimal
        [37]    15384994    decimal
        [38]    15388036    decimal
        [39]    15388874    decimal
        [40]    15390556    decimal
        [41]    15397486    decimal
        [42]    15398320    decimal
        [43]    15401318    decimal
        [44]    15421131    decimal
        [45]    15421937    decimal
        [46]    15422192    decimal
        [47]    15433173    decimal
        [48]    15433807    decimal
        [49]    15435566    decimal
        [50]    15447574    decimal
        [51]    15448831    decimal
        [52]    15449755    decimal
        [53]    15450751    decimal
        [54]    15452924    decimal
        [55]    15456465    decimal
        [56]    15456590    decimal
        [57]    15458653    decimal
        [58]    15458901    decimal
        [59]    15461998    decimal
        [60]    15465107    decimal
        [61]    15467755    decimal
        [62]    15468099    decimal
        [63]    15470126    decimal
        [64]    15475251    decimal
        [65]    15475461    decimal
        [66]    15478303    decimal
        [67]    15479254    decimal
        [68]    15479572    decimal
        [69]    15479736    decimal
        [70]    15484821    decimal
        [71]    15487227    decimal
        [72]    15487287    decimal
        [73]    15489577    decimal
        [74]    15490132    decimal
        [75]    15501961    decimal
        [76]    15503943    decimal
        [77]    15505543    decimal
        [78]    15510316    decimal
        [79]    15515724    decimal
        [80]    15523378    decimal
        [81]    15526558    decimal
        [82]    15529204    decimal
        [83]    15538443    decimal
        [84]    15554417    decimal
        [85]    15564955    decimal
        [86]    15569189    decimal
        [87]    15575242    decimal
        [88]    15575635    decimal
        [89]    15578111    decimal
        [90]    15580710    decimal
        [91]    15585660    decimal
        [92]    15589332    decimal
        [93]    15594166    decimal
        [94]    15597341    decimal
        [95]    15603662    decimal
        [96]    15608792    decimal
        [97]    15618128    decimal
        [98]    15620785    decimal
        [99]    15620915    decimal
+       Raw View        

Answer 1

After looking into this, I've determined Twitter didn't change anything. This appears to be a real live bug having to do with parsing geo location data.

JSON.NET (the library Twitterizer uses to deserialize json data) reads a coordinate value as a long, but Twitterizer is casting it as a double.

Two lines of code later and the bug is fixed.

If you would like to apply the patch yourself, the fix is in Twitterizer2\\Methods\\Geo\\Coordinate.cs

Line 119 becomes:

result[itemIndex].Latitude = Convert.ToDouble(reader.Value);

Line 123 becomes:

result[itemIndex].Longitude = Convert.ToDouble(reader.Value);