multipartpost.py 文件源码

def multipart_encode(vars, files, boundary=None, buf=None):
        if boundary is None:
            boundary = mimetools.choose_boundary()

        if buf is None:
            buf = ""

        for (key, value) in vars:
            if key is not None and value is not None:
                buf += "--%s\r\n" % boundary
                buf += "Content-Disposition: form-data; name=\"%s\"" % key
                buf += "\r\n\r\n" + value + "\r\n"

        for (key, fd) in files:
            file_size = os.fstat(fd.fileno())[stat.ST_SIZE] if isinstance(fd, file) else fd.len
            filename = fd.name.split("/")[-1] if "/" in fd.name else fd.name.split("\\")[-1]
            try:
                contenttype = mimetypes.guess_type(filename)[0] or "application/octet-stream"
            except:
                # Reference: http://bugs.python.org/issue9291
                contenttype = "application/octet-stream"
            buf += "--%s\r\n" % boundary
            buf += "Content-Disposition: form-data; name=\"%s\"; filename=\"%s\"\r\n" % (key, filename)
            buf += "Content-Type: %s\r\n" % contenttype
            # buf += "Content-Length: %s\r\n" % file_size
            fd.seek(0)

            buf = str(buf) if not isinstance(buf, unicode) else buf.encode("utf8")
            buf += "\r\n%s\r\n" % fd.read()

        buf += "--%s--\r\n\r\n" % boundary

        return boundary, buf