[英]Parallel http post requests (Multithreading) C#
我该如何在c#中发出10个并行的http post请求(同时发送)? 我正在使用xNet库处理请求和响应。 这是代码:
private void getUsersFromGroup(string groupId)
{
HttpRequest request = new HttpRequest();
RequestParams rp = new RequestParams();
HttpResponse res;
string resStr;
rp["offset"] = "0";
rp["count"] = "1000";
rp["online"] = "1";
rp["group_id"] = groupId;
rp["access_token"] = access_token;
rp["v"] = apiVersion;
res = request.Post(Api + "users.search", rp);
resStr = res.ToString();
var obj = JsonConvert.DeserializeObject<RootObject>(resStr);
if (obj.response.count != 0)
{
foreach (var item in obj.response.items)
{
if (!usersID.Contains(item.id))
{
usersID.Add(item.id);
}
}
}
}
我在foreach循环中调用此方法,也许会有所改变。
public void getUsers()
{
foreach (string groupID in groups)
{
getUsersFromGroup(groupID);
}
}
我希望能够每秒发送3个API请求。 我该怎么做?
如果您不想使用ThreadPool,则可以在分离的线程上运行方法,如下所示:
foreach (var groupId in groupIds) {
var thread = new System.Threading.Thread(() => getUsersFromGroup(groupId));
thread.Start();
}
您绝对应该尝试Task.WhenAll。 示例代码如下所示:
public async Task<IEnumerable<UserDto>> GetUsersInParallel(IEnumerable<int> userIds)
{
var tasks = userIds.Select(id => client.GetUser(id));
var users = await Task.WhenAll(tasks);
return users;
}
public async Task<UserDto> GetUser(int id)
{
var response = await client.GetAsync("http://youraddress/api/users/" + id)
.ConfigureAwait(false);
var user = JsonConvert.DeserializeObject<UserDto>(await response.Content.ReadAsStringAsync());
return user;
}
有关完整分析和更多代码,请访问我的博客文章: http : //www.michalbialecki.com/2018/04/19/how-to-send-many-requests-in-parallel-in-asp-net-core/
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