我需要创建对验证码识别API的multipart / form-data请求。 在API描述页面上,我找到了请求模板:
<form method="post" action="https://captchasiteapi.com/in.php" enctype="multipart/form-data">
<input type="hidden" name="method" value="post">
Your key:
<input type="text" name="key" value="YOUR_APIKEY">
Captcha file:
<input type="file" name="file">
<input type="submit" value="Upload and get ID">
/<form>
我基于HttpClient编写了此方法:
private async Task<string> UploadRequestAsync(string url, string filePath, string profileApiKey)
{
var client = new HttpClient();
var formData = new MultipartFormDataContent();
var filestream = new FileStream(filePath, FileMode.Open);
var fileName = Path.GetFileName(filePath);
formData.Add(new StringContent("post"), "hidden", "method");
formData.Add(new StringContent(profileApiKey), "key");
formData.Add(new StreamContent(filestream), "file", fileName);
formData.Add(new StringContent("Upload and get ID"), "submit");
var response = await client.PostAsync(url, formData);
if (!response.IsSuccessStatusCode){
return null;
}
return await response.Content.ReadAsStringAsync();
}
但是真的不确定如何创建<input type="hidden" name="method" value="post">
行。如何在表格中创建3个值?
API的结果是类似“ OK | CaptchaValue”的字符串,因此Task<string>
应该没问题。