我们的要求是使用ConvertAPI将存储在数据库中的文件,字节数组转换为PDF . 我们尝试了多种选择,但是如下所述,我们会遇到不同的错有人可以帮助我们将Byte文件格式转换为PDF .
错误1 - 远程服务器返回错误:(400)错误请求 .
using (var client = new WebClient())
{
client.Headers.Add("accept", "application/octet-stream");
client.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
var resultFile = client.UploadData("https://v2.convertapi.com/doc/to/pdf?Secret=**********", byteTemplate);
}
错误2 - 远程服务器返回错误:(400)错误请求
var requestContent = new MultipartFormDataContent();
ByteArrayContent data = new ByteArrayContent(byteTemplate, 0, byteTemplate.Count());
requestContent.Add(data, "File", "Files");
requestContent.Add(new StringContent("**********"), "Secret");
var authParam = parameters.ContainsKey("secret") ? $"Secret={parameters["secret"]}" : $"Token={parameters["token"]}";
return new HttpClient().PostAsync($"https://v2.convertapi.com/{srcFormat}/to/{dstFormat}?{authParam}", requestContent).Result;
错误3 - 代码“:5001,”消息“:”转换失败 . “
或无法访问已处置的对象 . 对象名:'System.Net.Http.MultipartFormDataContent'
public static HttpResponseMessage Convert(string srcFormat, string dstFormat, Dictionary<string, string> parameters, byte[] bytetemp, MemoryStream streamTemplate)
{
var requestContent = new MultipartFormDataContent();
streamTemplate.Position = 0;
requestContent.Add(new StreamContent(streamTemplate), "File", "ABC");
foreach (var parameter in parameters)
{
if (File.Exists(parameter.Value))
{
}
else
{
requestContent.Add(new StringContent(parameter.Value), parameter.Key);
}
}
var authParam = parameters.ContainsKey("secret") ? $"Secret={parameters["secret"]}" : $"Token={parameters["token"]}";
HttpContent rescont = new HttpClient().PostAsync($"https://v2.convertapi.com/{srcFormat}/to/{dstFormat}?{authParam}", requestContent).Result.Content;
String a = rescont.ReadAsStringAsync().Result;
}
错误4 - 远程服务器返回错误:(400)错误请求 .
带有新URL的旧代码,使用旧URL
public static byte[] CovertWordtoPdf(byte[] response)
{
byte[] bufferDocxReport;
bufferDocxReport = response;
string reportName = "reportname.doc";
#region Convert DOCX report to PDF format
WebRequest convertToPdfRequest = WebRequest.Create("https://v2.convertapi.com/docx/to/pdf?Secret=************");
convertToPdfRequest.Method = "POST";
var boundary = "---------------------------" + DateTime.Now.Ticks.ToString("x", NumberFormatInfo.InvariantInfo);
convertToPdfRequest.ContentType = "multipart/form-data; boundary=" + boundary;
boundary = "--" + boundary;
using (var requestStream = convertToPdfRequest.GetRequestStream())
{
// Write the file
var buffer = Encoding.ASCII.GetBytes(boundary + Environment.NewLine);
requestStream.Write(buffer, 0, buffer.Length);
buffer = Encoding.UTF8.GetBytes(string.Format("Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"{2}", "name", reportName, Environment.NewLine));
requestStream.Write(buffer, 0, buffer.Length);
buffer = Encoding.ASCII.GetBytes(string.Format("Content-Type: {0}{1}{1}", "application/octet-stream", Environment.NewLine));
requestStream.Write(buffer, 0, buffer.Length);
requestStream.Write(bufferDocxReport, 0, bufferDocxReport.Length);
buffer = Encoding.ASCII.GetBytes(Environment.NewLine);
requestStream.Write(buffer, 0, buffer.Length);
var boundaryBuffer = Encoding.ASCII.GetBytes(boundary + "--");
requestStream.Write(boundaryBuffer, 0, boundaryBuffer.Length);
}
using (var convertToPdfResponse = convertToPdfRequest.GetResponse())
using (Stream convertToPdfResponseStream = convertToPdfResponse.GetResponseStream())
{
bufferDocxReport = ReadToEnd(convertToPdfResponseStream);
}
return bufferDocxReport;
#endregion
}
错误5 - 代码:5001,消息:“转换失败 .
var requestContent = new MultipartFormDataContent();
streamTemplate.Position = 0;
StreamContent data = new StreamContent(streamTemplate);
requestContent.Add(data, "File", "Files");
requestContent.Add(new StringContent("************"), "Secret");
var authParam = parameters.ContainsKey("secret") ? $"Secret={parameters["secret"]}" : $"Token={parameters["token"]}";
return new HttpClient().PostAsync($"https://v2.convertapi.com/{srcFormat}/to/{dstFormat}?{authParam}", requestContent).Result;
1 回答
工作的解决方案是
我想指出几个重要的事情:
我们应该将请求的内容类型设置为application / octet-stream,因为我们在请求体中发送纯二进制数据 .
还应该提供content-disposition以让Rest API endpoints 知道发送了什么数据,在这种情况下它是文件 .