我有一個非常簡單的系統：托管在domain.ru上的 ASP .NET Core 服務器。在 API 控制器中，我有兩種方法：
[HttpGet("{id}")]
public string Get(int id)
{
try
{
using (FileStream fstream = new FileStream(string.Format(@"{0}\data{1}.txt", _path, id.ToString()), FileMode.OpenOrCreate))
{
byte[] array = System.Text.Encoding.Default.GetBytes(id.ToString());
fstream.Write(array, 0, array.Length);
return "It's ok!";
}
}
catch
{
return "Something went wrong";
}
}
[HttpPost]
public string Post(string resolvedString)
{
try
{
using (FileStream fstream = new FileStream(string.Format(@"{0}\dataPost.txt", _path), FileMode.OpenOrCreate))
{
byte[] array = System.Text.Encoding.Default.GetBytes(resolvedString);
fstream.Write(array, 0, array.Length);
return "It's ok!";
}
}
catch
{
return "Something went wrong";
}
}
所以基本上他們都只是在_path目錄中創建文本檔案。我無法理解的部分是當我嘗試通過 url domain.ru/api/values/1呼叫 Get 方法時，我可以看到在_path目錄中創建的檔案，并且我有回應“沒關系！”。這就是我呼叫 Get 的方式：
var client = new HttpClient();
client.BaseAddress = new Uri(uri);
HttpResponseMessage response = await client.GetAsync("api/values/1");
string result = await response.Content.ReadAsStringAsync();
textBox1.Text = result.ToString();
但是，當我對 Post 嘗試相同的操作時，當我使用 C# 執行此操作時，出現錯誤請求或使用 Postman 執行此操作時出現“出現問題”。這就是我呼叫 Post 的方式
var client = new HttpClient();
client.BaseAddress = new Uri(uri);
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
MultipartFormDataContent content = new MultipartFormDataContent();
StringContent str = new StringContent("1");
content.Add(str);
HttpResponseMessage response = await client.PostAsync("api/values/", content);
string returnString = await response.Content.ReadAsStringAsync();
MessageBox.Show(returnString);
這是我嘗試手動除錯時請求顯示的內容
And the most fun part. When I try to do all the same actions when my server is hosted on IIS (localserver) it works just fine! I' really don't know what I am doing wrong. Please, help.
UPD. Thanks to Jonathan, I asked my hoster to disable ModSecurity in Plesk and the above code started to work after replacing [HttpPost] by [HttpPost("{resolvedString}")]. So far so good!
Then I tried to send a zip archive to the server. Here is the server's controller code:
[HttpPost]
public string ImportZip(IFormFile file)
{
DirectoryInfo dirInfo = new DirectoryInfo(_extractPath);
try
{
foreach (FileInfo myfile in dirInfo.GetFiles())
{
myfile.Delete();
}
string path = _path "tmp.zip";
if (Request.HasFormContentType)
{
var form = Request.Form;
foreach (var formFile in form.Files)
{
using (var fileStream = new FileStream(path, FileMode.Create))
{
formFile.CopyTo(fileStream);
}
ZipFile.ExtractToDirectory(_path "tmp.zip", _extractPath);
}
}
return "It's OK! At least we've entered the method.";
}
catch
{
return "Oh no no no...";
}
}
And that's how I call it from the client:
string filepath = _zipFile;
string filename = _fileName;
var client = new HttpClient();
client.BaseAddress = new Uri(uri);
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
MultipartFormDataContent content = new MultipartFormDataContent();
ByteArrayContent fileContent = new ByteArrayContent(File.ReadAllBytes(filepath));
content.Add(fileContent, "file", filename);
HttpResponseMessage response = await client.PostAsync("File/ImportZip/", content);
string result = await response.Content.ReadAsStringAsync();
textBox1.Text = result;
Once again, it works as it should when I run both server and client on my computer. I can see downloaded archive and extracted files in destination directories. But when I upload my server to hosting and try to execute my query once again, I get the same error: an example of an error
uj5u.com熱心網友回復：
好吧，似乎我自己找到了答案。將它留在這里，以便它可以幫助某人（將來可能是我）。
客戶端發送方法的代碼：
string uri = "https://example.com/controller/action/";
string zipFile = @"C:\Path\To\Your\File.txt";
string response;
using (WebClient client = new WebClient())
{
response = Encoding.Default.GetString(client.UploadFile(uri, zipFile));
}
MessageBox.Show(response);
這里我們只是撰寫一個請求并發送一個檔案。路徑和 url 是硬編碼的。
服務端保存方法的代碼：
[HttpPost]
public string ImportZip(IFormFile file)
{
try
{
string path = _path "tmp.zip";
if (Request.HasFormContentType)
{
var form = Request.Form;
foreach (var formFile in form.Files)
{
using (var fileStream = new FileStream(path, FileMode.Create))
{
formFile.CopyTo(fileStream);
}
}
return "Done";
}
return "Empty request";
}
catch
{
return "No access";
}
}
只要我只發送一個檔案并且我知道它的擴展名并且我希望它被稱為“tmp”，我就會對其名稱和擴展名進行硬編碼。您可以采用檔案的默認名稱/擴展名來按原樣保存。然后我將請求中的所有檔案保存到選定的_path目錄中。
基本上就是這樣。
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標籤：c# asp.net 邮政 asp.net-web-api 得到