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feat: fetch should accept a FormData body (#4363)

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crowlKats 2020-03-17 07:32:43 +01:00 • committed by GitHub
parent f9557a4ff6
commit 9833975ef2
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3 changed files with 64 additions and 4 deletions
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42
cli/js/web/fetch.ts
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@ -13,6 +13,7 @@ import { FormData } from "./form_data.ts";
import { URL } from "./url.ts";
import { URLSearchParams } from "./url_search_params.ts";
import { fetch as opFetch, FetchResponse } from "../ops/fetch.ts";
import { DomFileImpl } from "./dom_file.ts";
function getHeaderValueParams(value: string): Map<string, string> {
const params = new Map();
@ -499,8 +500,47 @@ export async function fetch(
} else if (init.body instanceof DenoBlob) {
body = init.body[blobBytesSymbol];
contentType = init.body.type;
} else if (init.body instanceof FormData) {
let boundary = "";
if (headers.has("content-type")) {
const params = getHeaderValueParams("content-type");
if (params.has("boundary")) {
boundary = params.get("boundary")!;
}
}
if (!boundary) {
boundary =
"----------" +
Array.from(Array(32))
.map(() => Math.random().toString(36)[2] || 0)
.join("");
}
let payload = "";
for (const [fieldName, fieldValue] of init.body.entries()) {
let part = `\r\n--${boundary}\r\n`;
part += `Content-Disposition: form-data; name=\"${fieldName}\"`;
if (fieldValue instanceof DomFileImpl) {
part += `; filename=\"${fieldValue.name}\"`;
}
part += "\r\n";
if (fieldValue instanceof DomFileImpl) {
part += `Content-Type: ${fieldValue.type ||
"application/octet-stream"}\r\n`;
}
part += "\r\n";
if (fieldValue instanceof DomFileImpl) {
part += new TextDecoder().decode(fieldValue[blobBytesSymbol]);
} else {
part += fieldValue;
}
payload += part;
}
payload += `\r\n--${boundary}--`;
body = new TextEncoder().encode(payload);
contentType = "multipart/form-data; boundary=" + boundary;
} else {
// TODO: FormData, ReadableStream
// TODO: ReadableStream
notImplemented();
}
if (contentType && !headers.has("content-type")) {