97 lines
3.0 KiB
TypeScript
97 lines
3.0 KiB
TypeScript
|
import { WindowHeaders } from "./WindowHeaders";
|
||
|
|
import { iterateHeaders, iterateHeadersKeys } from "./iterateHeaders";
|
||
|
|
|
||
|
|
// Declare that there is a global property named "Headers" - this might not be present at runtime
|
||
|
|
declare const Headers: any;
|
||
|
|
|
||
|
|
/** @internal */
|
||
|
|
export function normalizeName(name: any): string {
|
||
|
|
if (typeof name !== "string") {
|
||
|
|
name = String(name)
|
||
|
|
}
|
||
|
|
if (/[^a-z0-9\-#$%&'*+.\^_`|~]/i.test(name)) {
|
||
|
|
throw new TypeError("Invalid character in header field name")
|
||
|
|
}
|
||
|
|
return name.toLowerCase()
|
||
|
|
}
|
||
|
|
|
||
|
|
/** @internal */
|
||
|
|
export function normalizeValue(value: any): string {
|
||
|
|
if (typeof value !== "string") {
|
||
|
|
value = String(value)
|
||
|
|
}
|
||
|
|
return value
|
||
|
|
}
|
||
|
|
|
||
|
|
// getHeadersValues abstracts the difference between get() and getAll() between browsers and always returns an array
|
||
|
|
/** @internal */
|
||
|
|
export function getHeaderValues(headersAsNative: Headers, key: string): string[] {
|
||
|
|
const headers = toWindowHeaders(headersAsNative);
|
||
|
|
if (headers instanceof Headers && headers.getAll) {
|
||
|
|
// If the headers instance has a getAll function then it will return an array
|
||
|
|
return headers.getAll(key);
|
||
|
|
}
|
||
|
|
|
||
|
|
// There is no getAll() function so get *should* return an array
|
||
|
|
const getValue = headers.get(key);
|
||
|
|
if (getValue && typeof getValue === "string") {
|
||
|
|
// some .get() implementations return a string even though they don't have a .getAll() - notably Microsoft Edge
|
||
|
|
return [getValue];
|
||
|
|
}
|
||
|
|
return getValue;
|
||
|
|
}
|
||
|
|
|
||
|
|
// toWindowHeaders casts the native browser class to an interface that includes functions of different browser implementations
|
||
|
|
function toWindowHeaders(headersAsNative: Headers): WindowHeaders {
|
||
|
|
return headersAsNative as any as WindowHeaders;
|
||
|
|
}
|
||
|
|
|
||
|
|
// getHeaderKeys returns an array of keys in a headers instance
|
||
|
|
/** @internal */
|
||
|
|
export function getHeaderKeys(headersAsNative: Headers): string[] {
|
||
|
|
const headers = toWindowHeaders(headersAsNative);
|
||
|
|
const asMap: {[key: string]: boolean} = {};
|
||
|
|
const keys: string[] = [];
|
||
|
|
|
||
|
|
if (headers.keys) {
|
||
|
|
iterateHeadersKeys(headers, key => {
|
||
|
|
if (!asMap[key]) {
|
||
|
|
// Only add the key if it hasn't been added already
|
||
|
|
asMap[key] = true;
|
||
|
|
keys.push(key);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
} else if (headers.forEach) {
|
||
|
|
headers.forEach((_, key) => {
|
||
|
|
if (!asMap[key]) {
|
||
|
|
// Only add the key if it hasn't been added already
|
||
|
|
asMap[key] = true;
|
||
|
|
keys.push(key);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
} else {
|
||
|
|
// If keys() and forEach() aren't available then fallback to iterating through headers
|
||
|
|
iterateHeaders(headers, (entry: string[]) => {
|
||
|
|
const key = entry[0];
|
||
|
|
if (!asMap[key]) {
|
||
|
|
// Only add the key if it hasn't been added already
|
||
|
|
asMap[key] = true;
|
||
|
|
keys.push(key);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
return keys;
|
||
|
|
}
|
||
|
|
|
||
|
|
/** @internal */
|
||
|
|
export function splitHeaderValue(str: string) {
|
||
|
|
const values: string[] = [];
|
||
|
|
const commaSpaceValues = str.split(", ");
|
||
|
|
commaSpaceValues.forEach(commaSpaceValue => {
|
||
|
|
commaSpaceValue.split(",").forEach(commaValue => {
|
||
|
|
values.push(commaValue);
|
||
|
|
});
|
||
|
|
});
|
||
|
|
return values;
|
||
|
|
}
|