This is some preamble
------WebKitFormBoundaryZ3oJB7WHOBmOjrEi
Content-Disposition: form-data; name="firstname"

Malcolm
------WebKitFormBoundaryZ3oJB7WHOBmOjrEi
Content-Disposition: form-data; name="surname"

Sparks
------WebKitFormBoundaryZ3oJB7WHOBmOjrEi
Content-Disposition: form-data; name="phone"

1234
------WebKitFormBoundaryZ3oJB7WHOBmOjrEi--
Here is some epilogue