C#•10mo ago

API request, working in Postman but not C#

I'm trying to call a certain API and then get a response back. When I run the code in Postman it works fine, I get the right response. But when I run it in C#, I get 403 forbidden. If I run the code in Postman without the JSON body, then I get 400 bad request. So I know it's not the JSON that's the issue, meaning it's probably the headers. Could someone give me a hint at what I should look at to solve this problem?

string jsonString = "{\"purpose\":\"MAX\",\"applicants\":[{\"birthYear\":2003,\"qualifiesEmploymentLength\":true,\"monthlyIncome\":55000,\"employmentType\":\"PERMANENT\",\"employmentRole\":\"\",\"maritalStatus\":\"SINGLE\"}],\"existingProperties\":[],\"household\":{\"children\":[],\"amortizationStudentDebt\":729,\"otherAssets\":0,\"carCost\":[{\"type\":\"OWNED\"}]},\"intermediaryType\":\"454\",\"newProperty\":{\"propertyType\":\"HOUSE\",\"mortgage\":null,\"downPayment\":700000,\"municipality\":\"Örebro\",\"livingSpace\":130}}";

var client = new HttpClient();
client.BaseAddress = new Uri("https://api.sbab.se/api/pre-approval/2.0/");

var content = new StringContent(jsonString, Encoding.UTF8, "application/json");

var response = client.PostAsync("loan-offer", content).Result;


Console.WriteLine(jsonString);

string jsonString = "{\"purpose\":\"MAX\",\"applicants\":[{\"birthYear\":2003,\"qualifiesEmploymentLength\":true,\"monthlyIncome\":55000,\"employmentType\":\"PERMANENT\",\"employmentRole\":\"\",\"maritalStatus\":\"SINGLE\"}],\"existingProperties\":[],\"household\":{\"children\":[],\"amortizationStudentDebt\":729,\"otherAssets\":0,\"carCost\":[{\"type\":\"OWNED\"}]},\"intermediaryType\":\"454\",\"newProperty\":{\"propertyType\":\"HOUSE\",\"mortgage\":null,\"downPayment\":700000,\"municipality\":\"Örebro\",\"livingSpace\":130}}";

var client = new HttpClient();
client.BaseAddress = new Uri("https://api.sbab.se/api/pre-approval/2.0/");

var content = new StringContent(jsonString, Encoding.UTF8, "application/json");

var response = client.PostAsync("loan-offer", content).Result;


Console.WriteLine(jsonString);

11 Replies

Jimmacle•10mo ago

403 suggests an authentication issue are you using the same credentials for both requests?

IsaaaakOP•10mo ago

there are no credentials/no auth it's not required)

IsaaaakOP•10mo ago

Unknown User•10mo ago

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IsaaaakOP•10mo ago

I do think I have that, I'm not really familiar with the concept however. I just removed this serialization for debugging purposes and put the actual JSON instead

Unknown User•10mo ago

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IsaaaakOP•10mo ago

Basically followed this tutorial https://tutorials.eu/how-to-call-post-api-in-csharp/

Jafar Jabbarzadeh

TutorialsEU

How to call POST API in C# | TutorialsEU

In this article, we will create a simple project demonstrating how to call Post API in C# and how to serialize and deserialize C# objects to and from JSON.

IsaaaakOP•10mo ago

but then I have to deal with tasks and stuff :(

Unknown User•10mo ago

Message Not Public

IsaaaakOP•10mo ago

anyways if we disregard this because I'm pretty sure the JSON is not the problem the problem is the headers I think Any1 got any idea?

Jimmacle•10mo ago

start by making your postman and C# requests match exactly, then remove things until you find what triggers the issue

Gaming

Programming

API request, working in Postman but not C#