内容语言标头在调用Ebay API时引发错误使用的标头名称错误

Question

当我使用Ebay API向CreateOrReplaceInventoryItem发出PUT请求时,会出现以下错误：

标头名称使用不当。确保请求标头与HttpRequestMessage一起使用，响应标头与HttpReponseMessage一起使用，内容标头与HttpContent对象一起使用。

using (var client = new HttpClient())
{
    var baseUri = new Uri(string.Format("https://api.sandbox.ebay.com/sell/inventory/v1/inventory_item/{0}", SKU));
    client.DefaultRequestHeaders.Add("Authorization", string.Format("Bearer {0}", token));
    client.DefaultRequestHeaders.Add("Content-Language", "en-US");

    var payload = JsonConvert.SerializeObject(product);
    var content = new StringContent(payload, Encoding.UTF8, "application/json");

    var response = client.PutAsync(baseUri, content).Result;
    return response.Content.ReadAsStringAsync().Result;
}

client.DefaultRequestHeaders.Add("Content-Language", "en-US");

然后我得到一个返回的错误对象：

errors":[{"errorId":25709,"domain":"API_INVENTORY","subdomain":"Selling","category":"REQUEST","message":"Invalid value for header Content-Language."}]} 

我做错了什么？有没有另一种我不知道的设置内容语言的方法？

Answer 1

由于Content-language是一个内容头，您应该在HttpContent实例中分配它，而不是DefaultRequestHeaders。基于您的代码的情况如下所示：

using (var client = new HttpClient())
{
    var baseUri = new Uri(string.Format("https://api.sandbox.ebay.com/sell/inventory/v1/inventory_item/{0}", SKU));
    client.DefaultRequestHeaders.Add("Authorization", string.Format("Bearer {0}", token));

    var payload = JsonConvert.SerializeObject(product);
    var content = new StringContent(payload, Encoding.UTF8, "application/json");
    content.Headers.Add("Content-Language", "en-US");

    var response = client.PutAsync(baseUri, content).Result;
    return response.Content.ReadAsStringAsync().Result;
}