Is HttpClient safe to use concurrently?

.net c#-4.0 concurrency dotnet-httpclient
Alex K picture Alex K · Jun 24, 2012 · Viewed 72.8k times · Source

In all the examples I can find of usages of HttpClient, it is used for one off calls. But what if I have a persistent client situation, where several requests can be made concurrently? Basically, is it safe to call client.PostAsync on 2 threads at once against the same instance of HttpClient.

I am not really looking for experimental results here. As a working example could simply be a fluke (and a persistent one at that), and a failing example can be a misconfiguration issue. Ideally I'm looking for some authoritative answer to the question of concurrency handling in HttpClient.

Answer

Marcel N. picture Marcel N. · Jun 24, 2012

According to MSDN, since .NET 4.5 The following instance methods are thread safe (thanks @ischell):

CancelPendingRequests
DeleteAsync
GetAsync
GetByteArrayAsync
GetStreamAsync
GetStringAsync
PostAsync
PutAsync
SendAsync

Related questions

How to get first object out from List<Object> using Linq

I have below code in c# 4.0. //Dictionary object with Key as string and Value as List of Component type object Dictionary<String, List<Component>> dic = new Dictionary<String, List<Component>>(); //Here I …

Read More
C# Create New T()

You can see what I'm trying (but failing) to do with the following code: protected T GetObject() { return new T(); } Any help would be greatly appreciated. EDIT: The context was as follows. I was playing around with a custom controller …

Read More
What is the 'dynamic' type in C# 4.0 used for?

C# 4.0 introduced a new type called 'dynamic'. It all sounds good, but what would a programmer use it for? Is there a situation where it can save the day?

Read More