graphql-yoga
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JavaScript
import { createGraphQLError } from '@graphql-tools/utils';
import { dset } from 'dset';
import { isContentTypeMatch } from './utils.js';
export function isPOSTMultipartRequest(request) {
return (request.method === 'POST' &&
isContentTypeMatch(request, 'multipart/form-data'));
}
export async function parsePOSTMultipartRequest(request) {
let requestBody;
try {
requestBody = await request.formData();
}
catch (e) {
if (e instanceof Error &&
e.message.startsWith('File size limit exceeded: ')) {
throw createGraphQLError(e.message, {
extensions: {
http: {
status: 413,
},
},
});
}
throw e;
}
const operationsStr = requestBody.get('operations');
if (!operationsStr) {
throw createGraphQLError('Missing multipart form field "operations"');
}
if (typeof operationsStr !== 'string') {
throw createGraphQLError('Multipart form field "operations" must be a string');
}
let operations;
try {
operations = JSON.parse(operationsStr);
}
catch (err) {
throw createGraphQLError('Multipart form field "operations" must be a valid JSON string');
}
const mapStr = requestBody.get('map');
if (mapStr != null) {
if (typeof mapStr !== 'string') {
throw createGraphQLError('Multipart form field "map" must be a string');
}
let map;
try {
map = JSON.parse(mapStr);
}
catch (err) {
throw createGraphQLError('Multipart form field "map" must be a valid JSON string');
}
for (const fileIndex in map) {
const file = requestBody.get(fileIndex);
const keys = map[fileIndex];
for (const key of keys) {
dset(operations, key, file);
}
}
}
return operations;
}