RFC1867中http文件上传报文的sample

6. Examples   Suppose the server supplies the following HTML:     <FORM ACTION="http://server.dom/cgi/handle"           ENCTYPE="multipart/form-data"           METHOD=POST>     What is your name? <INPUT TYPE=TEXT NAME=submitter>     What files are you sending? <INPUT TYPE=FILE NAME=pics>     </FORM>   and the user types "Joe Blow" in the name field, and selects a text   file "file1.txt" for the answer to 'What files are you sending?'   The client might send back the following data:        Content-type: multipart/form-data, boundary=AaB03x        --AaB03x        content-disposition: form-data; name="field1"        Joe Blow        --AaB03x        content-disposition: form-data; name="pics"; filename="file1.txt"        Content-Type: text/plain         ... contents of file1.txt ...        --AaB03x--   If the user also indicated an image file "file2.gif" for the answer   to 'What files are you sending?', the client might client might send   back the following data:        Content-type: multipart/form-data, boundary=AaB03x        --AaB03x        content-disposition: form-data; name="field1"        Joe Blow        --AaB03x        content-disposition: form-data; name="pics"        Content-type: multipart/mixed, boundary=BbC04y        --BbC04y        Content-disposition: attachment; filename="file1.txt"        Content-Type: text/plain        ... contents of file1.txt ...        --BbC04y        Content-disposition: attachment; filename="file2.gif"        Content-type: image/gif        Content-Transfer-Encoding: binary          ...contents of file2.gif...        --BbC04y--        --AaB03x--