| import { addQueryParameters } from "./util/add-query-parameters"; |
| import { extractUrlVariableNames } from "./util/extract-url-variable-names"; |
| import { omit } from "./util/omit"; |
| import { parseUrl } from "./util/url-template"; |
| export function parse(options) { |
| // https://fetch.spec.whatwg.org/#methods |
| let method = options.method.toUpperCase(); |
| // replace :varname with {varname} to make it RFC 6570 compatible |
| let url = (options.url || "/").replace(/:([a-z]\w+)/g, "{+$1}"); |
| let headers = Object.assign({}, options.headers); |
| let body; |
| let parameters = omit(options, [ |
| "method", |
| "baseUrl", |
| "url", |
| "headers", |
| "request", |
| "mediaType", |
| ]); |
| // extract variable names from URL to calculate remaining variables later |
| const urlVariableNames = extractUrlVariableNames(url); |
| url = parseUrl(url).expand(parameters); |
| if (!/^http/.test(url)) { |
| url = options.baseUrl + url; |
| } |
| const omittedParameters = Object.keys(options) |
| .filter((option) => urlVariableNames.includes(option)) |
| .concat("baseUrl"); |
| const remainingParameters = omit(parameters, omittedParameters); |
| const isBinaryRequset = /application\/octet-stream/i.test(headers.accept); |
| if (!isBinaryRequset) { |
| if (options.mediaType.format) { |
| // e.g. application/vnd.github.v3+json => application/vnd.github.v3.raw |
| headers.accept = headers.accept |
| .split(/,/) |
| .map((preview) => preview.replace(/application\/vnd(\.\w+)(\.v3)?(\.\w+)?(\+json)?$/, `application/vnd$1$2.${options.mediaType.format}`)) |
| .join(","); |
| } |
| if (options.mediaType.previews.length) { |
| const previewsFromAcceptHeader = headers.accept.match(/[\w-]+(?=-preview)/g) || []; |
| headers.accept = previewsFromAcceptHeader |
| .concat(options.mediaType.previews) |
| .map((preview) => { |
| const format = options.mediaType.format |
| ? `.${options.mediaType.format}` |
| : "+json"; |
| return `application/vnd.github.${preview}-preview${format}`; |
| }) |
| .join(","); |
| } |
| } |
| // for GET/HEAD requests, set URL query parameters from remaining parameters |
| // for PATCH/POST/PUT/DELETE requests, set request body from remaining parameters |
| if (["GET", "HEAD"].includes(method)) { |
| url = addQueryParameters(url, remainingParameters); |
| } |
| else { |
| if ("data" in remainingParameters) { |
| body = remainingParameters.data; |
| } |
| else { |
| if (Object.keys(remainingParameters).length) { |
| body = remainingParameters; |
| } |
| else { |
| headers["content-length"] = 0; |
| } |
| } |
| } |
| // default content-type for JSON if body is set |
| if (!headers["content-type"] && typeof body !== "undefined") { |
| headers["content-type"] = "application/json; charset=utf-8"; |
| } |
| // GitHub expects 'content-length: 0' header for PUT/PATCH requests without body. |
| // fetch does not allow to set `content-length` header, but we can set body to an empty string |
| if (["PATCH", "PUT"].includes(method) && typeof body === "undefined") { |
| body = ""; |
| } |
| // Only return body/request keys if present |
| return Object.assign({ method, url, headers }, typeof body !== "undefined" ? { body } : null, options.request ? { request: options.request } : null); |
| } |