使用ASP Web API,我创建了一个方法,该方法获取ID然后提供pdf文件,然后使用Google文档查看器或类似服务来查看文件,
代码看起来像这样,
[HttpGet]
public HttpResponseMessage GetAttachment(string id)
{
try {
string mapping = @"\\192.168.3.3\Archieve";
string sourcedir = @"\Digital\";
string filename = id + ".pdf";
string sourceFullPath = mapping + sourcedir + filename;
byte[] dataBytes = new byte[0];
// connect to other network using custom credential
var credential = new NetworkCredential("user", "pass", "192.168.3.3");
using (new NetworkConnection(mapping, credential)) {
dataBytes = File.ReadAllBytes(sourceFullPath);
}
HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.OK);
response.Content = new StreamContent(new MemoryStream(dataBytes));
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
response.Content.Headers.ContentDisposition.FileName = filename;
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");
return response;
}
catch (Exception ex) {
return Request.CreateResponse(HttpStatusCode.Gone, ex.Message);
}
}
使用此代码,我可以在网络浏览器上打开链接时下载pdf文件,但是当我尝试使用Google文档查看器显示它时,就像这样
https://docs.google.com/viewerng/viewer?url=http://myserver/webapi/api/File/GetAttachment/0317101532
Google无法正确显示该文件,
当我使用https://www.pdfescape.com/open/
等其他服务时,错误为The remote server returned an error: (405) Method Not Allowed.
编辑:我认为Google Docs查看器和pdfescape都需要直接链接到该文件,我可以在Web API控制器上生成直接链接吗?
答案 0 :(得分:2)
尝试将文件复制到本地,然后返回文件链接,如下所示
[HttpGet]
public IHttpActionResult GetAttachment(string id)
{
try {
string mapping = @"\\192.168.3.3\Archieve";
string sourcedir = @"\Digital\";
string filename = id + ".pdf";
string sourceFullPath = mapping + sourcedir + filename;
byte[] dataBytes = new byte[0];
// connect to other network using custom credential
var credential = new NetworkCredential("user", "pass", "192.168.3.3");
using (new NetworkConnection(mapping, credential)) {
dataBytes = File.ReadAllBytes(sourceFullPath);
}
// write file to local
string destFullPath = string.Format("{0}/Content/Data//{2}", HttpContext.Current.Server.MapPath("~"), filename);
File.WriteAllBytes(destFullPath, dataBytes);
// return the file name,
return Ok(filename);
// then you can view your docs using Google Viewer like this
// https://docs.google.com/viewer?url=http://[YOUR_SERVER_BASE_URL]/content/data/[FILENAME]
}
catch (Exception ex) {
return Content(HttpStatusCode.PreconditionFailed, ex.Message);
}
}
不要忘记在“内容”上添加必要的权限。夹