C# 如何使用HttpClient w.post发送数据和图像?
我需要使用C# 如何使用HttpClient w.post发送数据和图像?,c#,php,laravel,multipartform-data,dotnet-httpclient,C#,Php,Laravel,Multipartform Data,Dotnet Httpclient,我需要使用HttpClient执行post方法,并将其捕获到我的PHP web服务中 第一次,我开始使用FormUrlEncodedContent,没关系,我的web服务收到了这些数据。但现在我需要用户捕获一个图像并将其放入字节数组中 对于这一点,我想MultipartFormDataContent是这里的英雄。这就是我所拥有的 Dictionary<string, string> @params = new Diction ... byte[] im
HttpClient
执行post方法,并将其捕获到我的PHP web服务中
第一次,我开始使用FormUrlEncodedContent,没关系,我的web服务收到了这些数据。但现在我需要用户捕获一个图像并将其放入字节数组中
对于这一点,我想MultipartFormDataContent是这里的英雄。这就是我所拥有的
Dictionary<string, string> @params = new Diction ...
byte[] imageData = ...
var requestContent = new MultipartFormDataContent();
requestContent.Add(new FormUrlEncodedContent(@params));
requestContent.Add(new ByteArrayContent(imageData));
HttpClient client = new HttpClient();
HttpResponseMessage response = await client.PostAsync(request, requestContent);
response.EnsureSuccessStatusCode();
string responseBody = await response.Content.ReadAsStringAsync();
Dictionary@params=新词汇。。。
字节[]图像数据=。。。
var requestContent=new MultipartFormDataContent();
Add(新FormUrlEncodedContent(@params));
Add(新的ByteArrayContent(imageData));
HttpClient=新的HttpClient();
HttpResponseMessage response=wait client.PostAsync(请求,请求内容);
response.EnsureSuccessStatusCode();
string responseBody=wait response.Content.ReadAsStringAsync();
但当我收到回复时,我得到以下信息:
ResponseBy“\n警告:文件上载Mime头 第0行
\n{\“..”字符串中的未知内容被乱码
我不知道php代码或我的c#代码中是否有问题。我们也有类似的问题,我们必须摆脱HttpClient,因为它不是很灵活。在我们的情况下,我们必须将多个文件上传到服务器。我们最终使用了WebRequest。下面是工作代码。看看PostMultipart函数-其他一切都是h埃尔伯斯
public class UploadFile
{
public UploadFile(Stream data, string fieldName, string fileName, string contentType)
{
this.Data = data;
this.FieldName = fieldName;
this.FileName = fileName;
this.ContentType = contentType;
}
public UploadFile(string fileAbsPath, string fieldName, string fileName, string contentType)
: this(File.OpenRead(fileAbsPath), fieldName, fileName, contentType)
{
}
public UploadFile(string fileAbsPath, string fieldName, string contentType)
: this(fileAbsPath, fieldName, Path.GetFileName(fileAbsPath), contentType)
{
}
public UploadFile(string fileAbsPath)
: this(fileAbsPath, null, Path.GetFileName(fileAbsPath), "application/octet-stream")
{
}
public Stream Data { get; set; }
public string FieldName { get; set; }
public string FileName { get; set; }
public string ContentType { get; set; }
public DateTimeOffset? CreationDate { get; set; }
public DateTimeOffset? ModificationDate { get; set; }
}
class MimePart
{
private readonly NameValueCollection headers = new NameValueCollection();
private byte[] header;
private Stream data;
public override Stream Data
{
get
{
return this.data;
}
}
public void SetStream(Stream stream)
{
this.data = stream;
}
public NameValueCollection Headers
{
get { return this.headers; }
}
public byte[] Header
{
get { return this.header; }
}
public long GenerateHeaderFooterData(string boundary)
{
var sb = new StringBuilder();
sb.Append("--");
sb.Append(boundary);
sb.AppendLine();
foreach (string key in this.headers.AllKeys)
{
sb.Append(key);
sb.Append(": ");
sb.AppendLine(this.headers[key]);
}
sb.AppendLine();
this.header = Encoding.UTF8.GetBytes(sb.ToString());
return this.header.Length + this.Data.Length + 2;
}
}
private IList<MimePart> GenerateMimePartsList(IEnumerable<UploadFile> files)
{
var mimeParts = new List<MimePart>();
int nameIndex = 0;
// Files data
foreach (UploadFile file in files)
{
var streamMimePart = new StreamMimePart();
if (string.IsNullOrEmpty(file.FieldName))
{
file.FieldName = "file" + nameIndex++;
}
var contentDispositionValues = new List<string>();
contentDispositionValues.Add("form-data");
contentDispositionValues.Add(string.Format("name=\"{0}\"", file.FieldName));
contentDispositionValues.Add(string.Format("filename=\"{0}\"", file.FileName));
if (file.CreationDate.HasValue)
{
contentDispositionValues.Add(string.Format("creation-date=\"{0}\"", file.CreationDate.Value.ToString("R")));
}
if (file.ModificationDate.HasValue)
{
contentDispositionValues.Add(string.Format("modification-date=\"{0}\"", file.ModificationDate.Value.ToString("R")));
}
// "form-data; name=\"" + file.FieldName + "\"; filename=\"" + file.FileName + "\"";
streamMimePart.Headers["Content-Disposition"] = string.Join("; ", contentDispositionValues);
streamMimePart.Headers["Content-Type"] = file.ContentType;
streamMimePart.SetStream(file.Data);
mimeParts.Add(streamMimePart);
}
return mimeParts;
}
public void PostMultipart(Uri uri, IEnumerable<UploadFile> files)
{
var mimeParts = this.GenerateMimePartsList(files);
var boundary = "----------" + DateTime.Now.Ticks.ToString("x");
byte[] footer = Encoding.UTF8.GetBytes("--" + boundary + "--\r\n");
var request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "POST";
request.ContentType = "multipart/form-data; boundary=" + boundary;
request.ContentLength = mimeParts.Sum(part => part.GenerateHeaderFooterData(boundary)) + footer.Length;
try
{
// Write data
byte[] buffer = new byte[8192];
byte[] afterFile = Encoding.UTF8.GetBytes("\r\n");
using (Stream requestStream = request.GetRequestStream())
{
foreach (MimePart mimePart in mimeParts)
{
requestStream.Write(mimePart.Header, 0, mimePart.Header.Length);
int read;
while ((read = mimePart.Data.Read(buffer, 0, buffer.Length)) > 0)
{
requestStream.Write(buffer, 0, read);
}
mimePart.Data.Dispose();
requestStream.Write(afterFile, 0, afterFile.Length);
}
requestStream.Write(footer, 0, footer.Length);
}
// Get response
using (var response = (HttpWebResponse)request.GetResponse())
{
var responseText = response.ReadAsString();
return;
}
}
catch (WebException webException)
{
this.HandleErrorResponse(webException);
}
finally
{
foreach (var mimePart in mimeParts)
{
if (mimePart.Data != null)
{
mimePart.Data.Dispose();
}
}
}
return;
}
公共类上传文件
{
公共上载文件(流数据、字符串字段名、字符串文件名、字符串内容类型)
{
这个。数据=数据;
this.FieldName=字段名;
this.FileName=文件名;
this.ContentType=ContentType;
}
公共上载文件(字符串文件AbsPath、字符串字段名、字符串文件名、字符串内容类型)
:this(File.OpenRead(fileAbsPath)、字段名、文件名、contentType)
{
}
公共上载文件(字符串文件路径、字符串字段名、字符串内容类型)
:此(fileAbsPath、fieldName、Path.GetFileName(fileAbsPath)、contentType)
{
}
公共上载文件(字符串fileAbsPath)
:this(fileAbsPath,null,Path.GetFileName(fileAbsPath),“应用程序/八位字节流”)
{
}
公共流数据{get;set;}
公共字符串字段名{get;set;}
公共字符串文件名{get;set;}
公共字符串ContentType{get;set;}
公共日期时间偏移量?CreationDate{get;set;}
公共DateTimeOffset?修改日期{get;set;}
}
类MimePart
{
私有只读NameValueCollection标头=新的NameValueCollection();
专用字节[]头;
私有流数据;
公共覆盖流数据
{
得到
{
返回此.data;
}
}
公共流(流)
{
这个.data=stream;
}
public NameValueCollection标头
{
获取{返回this.headers;}
}
公共字节[]头
{
获取{返回this.header;}
}
公共长GenerateHeaderFooterData(字符串边界)
{
var sb=新的StringBuilder();
某人加上(“—”);
某人附加(边界);
(某人);
foreach(this.headers.AllKeys中的字符串键)
{
某人附加(钥匙);
某人加上(“:”);
sb.AppendLine(此标题[键]);
}
(某人);
this.header=Encoding.UTF8.GetBytes(sb.ToString());
返回this.header.Length+this.Data.Length+2;
}
}
私有IList GenerateMimePartsList(IEnumerable文件)
{
var mimeParts=新列表();
int nameIndex=0;
//文件数据
foreach(文件中的上载文件)
{
var streamMimePart=新streamMimePart();
if(string.IsNullOrEmpty(file.FieldName))
{
file.FieldName=“file”+nameIndex++;
}
var contentDispositionValues=新列表();
contentDispositionValues.Add(“表单数据”);
contentDispositionValues.Add(string.Format(“name=\”{0}\”,file.FieldName));
contentDispositionValues.Add(string.Format(“filename=\”{0}\”,file.filename));
if(file.CreationDate.HasValue)
{
contentDispositionValues.Add(string.Format(“创建日期=\”{0}\”,file.CreationDate.Value.ToString(“R”));
}
if(file.ModificationDate.HasValue)
{
contentDispositionValues.Add(string.Format(“修改日期=\”{0}\”,file.ModificationDate.Value.ToString(“R”));
}
//“表单数据;名称=\”“+file.FieldName+”\“文件名=\”“+file.filename+”\”;
streamMimePart.Headers[“Content Disposition”]=string.Join(“;”,contentDispositionValues);
streamMimePart.Headers[“Content Type”]=file.ContentType;
streamMimePart.SetStream(file.Data);
添加(streamMimePart);
}
退货零件;
}
公共void PostMultipart(Uri、IEnumerable文件)
{
var mimeParts=this.generateMememePartsList(文件);
var boundary=“------------”+DateTime.Now.Ticks.ToString(“x”);
byte[]footer=Encoding.UTF8.GetBytes(“--”+boundary+”--\r\n”);
var request=(HttpWebRequest)WebRequest.Create(uri);
request.Method=“POST”;
request.ContentType=“多部分/表单数据;boundary=“+boundary;
request.ContentLength=mimeParts.Sum(part=>part.GenerateHeaderFooterData(boundary))+footer.Length;
尝试
{
//写入数据
字节[]缓冲区=新字节[8192];
字节[]afterFile=Encoding.UTF8.GetBytes(“\r\n”);
使用(Stream requestStream=request.GetRequestStream())
{
foreach(MimePart-MimePart-in-MimePart)
{
Write(mimePart.Header,0,mimePart.Header.Length);
int-read;
而((read=mimePart.Data.read(buffer,0,buffer.Length))>0)
{
requestStream.Write(缓冲区,