const d = require("describe-property");
const parseContent = require("../multipart/parseContent");
const BOUNDARY_MATCHER = /^multipart\/.*boundary=(?:"([^"]+)"|([^;]+))/im;
const NAME_MATCHER = /\bname="([^"]+)"/i;
module.exports = function (mach) {
mach.Message.PARSERS["multipart/form-data"] = function (message, maxLength) {
function partHandler(part) {
return message.handlePart(part);
}
// If the content has been buffered, use the buffer.
Iif (message.isBuffered) {
return message.bufferContent().then(function (content) {
return parseContent(content, message.multipartBoundary, maxLength, partHandler);
});
}
return parseContent(message.content, message.multipartBoundary, maxLength, partHandler);
};
Object.defineProperties(mach.Message.prototype, {
/**
* The value that was used as the boundary for multipart content. This
* is present only in multipart messages.
*/
multipartBoundary: {
get() {
const contentType = this.contentType;
Iif (!contentType) {
return null;
}
const match = contentType.match(BOUNDARY_MATCHER);
return match ? match[1] || match[2] : null;
}
},
/**
* The unique "name" or ID of this message, as given in its Content-Disposition
* header. This is usually present only on messages that are part of a larger,
* multipart message.
*/
name: {
get() {
const contentDisposition = this.headers["Content-Disposition"];
Iif (!contentDisposition) {
return null;
}
const match = contentDisposition.match(NAME_MATCHER);
return match ? match[1] : this.headers["Content-ID"];
}
},
/**
* The filename of this message, as given in its Content-Disposition header.
* This is usually present only on messages that are part of a larger, multipart
* message and that originate from a file upload.
*/
filename: {
get() {
const contentDisposition = this.headers["Content-Disposition"];
Eif (contentDisposition) {
// Match quoted filenames.
let match = contentDisposition.match(/filename="([^;]*)"/i);
let filename;
if (match) {
filename = decodeURIComponent(match[1].replace(/\\"/g, "\""));
} else {
// Match unquoted filenames.
match = contentDisposition.match(/filename=([^;]+)/i);
if (match) {
filename = decodeURIComponent(match[1]);
}
}
if (filename) {
// Take the last part of the filename. This handles full Windows
// paths given by IE (and possibly other dumb clients).
return filename.substr(filename.lastIndexOf("\\") + 1);
}
}
return null;
}
}
/**
* A low-level hook responsible for handling Message objects embedded as multipart
* objects inside this message. It should return the value to use for the given
* message in the parameters hash. By default parts that originate from file uploads
* are buffered and all others are converted to strings.
*
* This should be overridden if you want to specify some kind of custom handling
* for multipart data, such as streaming it directly to a network file storage.
* For example, the server extension overrides this method to save uploaded files
* to a temporary location on disk.
*/
});
mach.Message.prototype.handlePart = function (part) {
return part.filename ? part.bufferContent() : part.stringifyContent();
};
};
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