问题源于我对如何使用我正在使用的 C# 库 (RestSharp) 的误解。经过一些调整，我能够生成一个有效的请求。这是它的样子：
PUT https://openapi.etsy.com/v2/listings/834145978/inventory HTTP/1.1
Host: openapi.etsy.com
Authorization: OAuth oauth_consumer_key="xxxxx",oauth_nonce="xxxxx",oauth_signature="xxxxx",oauth_signature_method="HMAC-SHA1",oauth_timestamp="xxxxx",oauth_token="xxxxx",oauth_version="1.0"
Accept: application/json, text/json, text/x-json, text/javascript, application/xml, text/xml
User-Agent: RestSharp/106.11.4.0
Connection: Keep-Alive
Request-Id: |feb37503-4e0cc9e4a34b242a.4.
Accept-Encoding: gzip, deflate
Content-Type: application/x-www-form-urlencoded
Content-Length: 654
products=%5B%0D%0A%20%20%7B%0D%0A%20%20%20%20%22product_id%22%3A%204638831553%2C%0D%0A%20%20%20%20%22sku%22%3A%20%22N27%22%2C%0D%0A%20%20%20%20%22property_values%22%3A%20%5B%5D%2C%0D%0A%20%20%20%20%22offerings%22%3A%20%5B%0D%0A%20%20%20%20%20%20%7B%0D%0A%20%20%20%20%20%20%20%20%22offering_id%22%3A%204740581353%2C%0D%0A%20%20%20%20%20%20%20%20%22price%22%3A%20%2265.00%22%2C%0D%0A%20%20%20%20%20%20%20%20%22quantity%22%3A%201%2C%0D%0A%20%20%20%20%20%20%20%20%22is_enabled%22%3A%201%2C%0D%0A%20%20%20%20%20%20%20%20%22is_deleted%22%3A%200%0D%0A%20%20%20%20%20%20%7D%0D%0A%20%20%20%20%5D%2C%0D%0A%20%20%20%20%22is_deleted%22%3A%200%0D%0A%20%20%7D%0D%0A%5D
需要注意的部分有：
- 请求方法为
PUT
-
Content-Type 标头是application/x-www-form-urlencoded
- 这是请求正文在为请求进行 url 编码之前的样子：
products=[
{
"product_id": 4638831553,
"sku": "N27",
"property_values": [],
"offerings": [
{
"offering_id": 4740581353,
"price": "65.00",
"quantity": 1,
"is_enabled": 1,
"is_deleted": 0
}
],
"is_deleted": 0
}
]
不完全相关，但这是我使用 C# 和 RestSharp 在 Etsy 中创建新列表的代码。这是一项正在进行的工作，需要清理，但它可以工作：
public async Task<ListingModel> PostListing(ListingCreateModel createModel)
{
// Create authenticator for the URL we will need to use.
_restClient.Authenticator = MakeAuthenticatorForProtectedResource();
// Update the create model, making sure we set the ShippingProfileId - this way
// you won't need to set it manually in every listing afterwards.
createModel.Quantity = createModel.Quantity;
createModel.ShippingProfileId = ShippingProfileId;
// Create a basic listing first, with minimal properties.
var basicListing = ExecuteAndDeserialize<ListingListModel>(
CreatePostRequest("listings", createModel)).Results.First();
// Get the current products for this listing (we'll need to modify that object
// and send it back to Etsy.)
var productList = ExecuteAndDeserialize<dynamic>(
CreateGetRequest($"listings/{basicListing.ListingId}/inventory"));
// set SKU, price, and quantity (just experimenting, you can set any
// supported properties you need here)
productList.results.products[0].sku = createModel.Sku;
productList.results.products[0].offerings[0].price =
createModel.Price.ToString("0.00");
productList.results.products[0].offerings[0].quantity =
createModel.Quantity;
// Now that we have an updated products list, call the PUT endpoint to
// update the listing.
// The CreatePutRequest method sets the 'Content-Type' header to
// 'application/x-www-form-urlencoded'.
// RestSharp will take care of serializing the `new { productList.results.products }`
// object to the form-urlencoded format.
var updatedListing = ExecuteAndDeserialize<dynamic>(
await CreatePutRequest($"listings/{basicListing.ListingId}/inventory",
new
{
productList.results.products
}));
var newListingList = ExecuteAndDeserialize<ListingListModel>(
CreateGetRequest($"listings/{basicListing.ListingId}"));
return newListingList.Results.First();
}
private async Task<IRestRequest> CreatePutRequest<TBody>(string resource, TBody body)
{
var request = new RestRequest(resource)
{
Method = Method.PUT
};
request.AddHeader("Content-Type", "application/x-www-form-urlencoded");
request.AddObject(body);
return request;
}
//-------- NOT SO RELEVANT TO THE QUESTION ----------
private IRestRequest CreateGetRequest(string resource)
{
var request = new RestRequest(resource)
{
Method = Method.GET
};
return request;
}
private OAuth1Authenticator MakeAuthenticatorForProtectedResource()
{
var auth = OAuth1Authenticator
.ForProtectedResource(_authRepo.AuthInfo.AppKey, _authRepo.AuthInfo.SharedSecret,
_authRepo.AuthInfo.AccessToken, _authRepo.AuthInfo.AccessTokenSecret);
return auth;
}
private T ExecuteAndDeserialize<T>(IRestRequest req)
{
var response = _restClient.Execute(req);
if (response.IsSuccessful)
{
return JsonConvert.DeserializeObject<T>(response.Content);
}
if ((int) response.StatusCode >= 400 && (int) response.StatusCode < 500)
{
throw new ValidationException(response.Content);
}
throw new InvalidOperationException(response.Content);
}