如何使用REST API和C#上传图片
如何使用REST API和C#上传图片
提问于 2015-10-03 21:55:47
我正在使用php REST API和C#通过使用RestSharp发布带有访问令牌的图像，发送图像文件和访问令牌作为参数，但我无法使用下面的示例程序实现
private static void postPrescription(string ext, string mime, string token)
{
var restClient = new RestClient("http://api.xxy.in/v1/docsupload");
restClient.AddHandler("application/octet-stream", new RestSharp.Deserializers.JsonDeserializer());
var request = new RestRequest(Method.POST);
request.AddHeader("Content-Type", "application/json");
request.AddHeader("client-Identifier", "192.168.1.24");
request.AddHeader("client-Platform", "kiosk");
request.AddHeader("client-Version", "2.00");
request.AddHeader("client-Type", "kiosk");
request.AddHeader("Accept", "application/json");
Dictionary<string, object> dict = new Dictionary<string, object>();
dict.Add("FILE_EXT", ext);
dict.Add("FILE_MIME_TYPE", mime);
byte[] imageBytes;
using (FileStream fs = File.Open(@"C:\Prescriptions\Presc_1_10_2015_17_19_17.jpeg", FileMode.Open))
{
imageBytes = new BinaryReader(fs).ReadBytes((int)fs.Length);
}
string image = Convert.ToBase64String(imageBytes);
dict.Add("IMAGE_DATA", image);
byte[] data = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(dict));
request.AddParameter("access_token", token);
request.AddParameter("userfile", data);
var response = restClient.Execute(request);
JavaScriptSerializer json = new JavaScriptSerializer();
Dictionary<string, object> dict1 = json.Deserialize<Dictionary<string, object>>(response.Content);
} 尝试使用上面的代码段时，我收到的响应为："{\" response \":400，\“message\”：\“不支持的文件\”}“
在此之后，我尝试使用HTTP POST方法，但没有成功，我得到的http响应为"{\" response \":401，\“message\”：\“您已注销以保护您的隐私。请重新登录。\“}”
这是我的第二个片段，
public static void prescriptionPost(string token)
{
var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://api.xxy.in/v1/docsupload");
httpWebRequest.ContentType = "text/json";
httpWebRequest.Method = "POST";
httpWebRequestHeaders(httpWebRequest);
httpWebRequest.ContentType = "application/octet-stream";
byte[] imageBytes;
using (FileStream fs = File.Open(@"C:\Prescriptions\Presc_1_10_2015_17_19_17.jpeg", FileMode.Open))
{
imageBytes = new BinaryReader(fs).ReadBytes((int)fs.Length);
}
string image = Convert.ToBase64String(imageBytes);
byte[] data = Encoding.UTF8.GetBytes(Newtonsoft.Json.JsonConvert.SerializeObject(image));
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
pres ps = new pres
{
access_token = token,
userfile = image
};
string json = Newtonsoft.Json.JsonConvert.SerializeObject(ps, Newtonsoft.Json.Formatting.Indented);
streamWriter.Write(json);
}
var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
{
StringBuilder output = new StringBuilder();
var result = streamReader.ReadToEnd();
var serializer = new JavaScriptSerializer();
var myobj = serializer.Deserialize<ObtainToken>(result);
}
// example deserializedProduct = Newtonsoft.Json.JsonConvert.DeserializeObject<example>(json);
}
internal class pres
{
public string access_token { get; set; }
public string userfile { get; set; }
}我不知道我的代码片段是否正确，或者RestApi中是否存在问题。有人能建议我如何实现这一点吗？
回答 1
Stack Overflow用户
发布于 2018-06-01 18:25:24
using RestSharp;
byte[] imgdata = ImageFileToByteArray(@"D:\SampleIMG.jpg");
RestRequest request = new RestRequest("URL", Method.POST);
request.AddParameter("secret_key", "secret_key_data");
request.AddParameter("Name_Key","Mahesh");
request.AddFile("imageKey", imgdata, "SampleIMG.jpg", "image/jpeg");
RestClient restClient = new RestClient();
IRestResponse response = restClient.Execute(request);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/32923409
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