问题
I am trying to consume a REST service using TRestClient but I believe there is an issue with the boundary string for multipart content.
I am capturing the body of the request I am sending, and this is the content type header:
Content-Type: multipart/form-data; boundary=-------Embt-Boundary--07CC944C29DA577E
Then, this is the first section of the multipart form:
-----------Embt-Boundary--07CC944C29DA577E
Content-Disposition: form-data; name="file"; filename="ce.csv"
Content-Type: text/csv
And this is how it ends:
---------Embt-Boundary--07CC944C29DA577E--
I don't think this is an issue on the server, as even my proxy is not able to parse the body:
When I compare this same request vs postman, I notice that the starting and ending boundaries do not match!
Starting: -----------Embt-Boundary--07CC944C29DA577E
Ending: ---------Embt-Boundary--07CC944C29DA577E--
I found that the boundary generation is done in TMultipartFormData.GenerateBoundary() from System.Net.Mime:
When checking the starting and ending boundaries from postman, they match, so I am almost sure this is the issue. I don't think it is related to my code, but let me know if you need it.
来源：https://stackoverflow.com/questions/60961222/delphi-10-trestclient-mime-boundary-issue