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Michael Mrowetz
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Feb 12, 2017
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| /** | ||
| * Heuristics used at parse-time for HAR data | ||
| */ | ||
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| import { hasHeader } from "../helpers/har"; | ||
| import { isInStatusCodeRange } from "../helpers/heuristics"; | ||
| import * as misc from "../helpers/misc"; | ||
| import { Entry } from "../typing/har"; | ||
| import { RequestType } from "../typing/waterfall"; | ||
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| function isCompressible(entry: Entry, requestType: RequestType): boolean { | ||
| const minCompressionSize = 1000; | ||
| // small responses | ||
| if (entry.response.bodySize < minCompressionSize) { | ||
| return false; | ||
| } | ||
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| if (misc.contains(["html", "css", "javascript", "svg", "plain"], requestType)) { | ||
| return true; | ||
| } | ||
| const mime = entry.response.content.mimeType; | ||
| const compressableMimes = ["application/vnd.ms-fontobject", | ||
| "application/x-font-opentype", | ||
| "application/x-font-truetype", | ||
| "application/x-font-ttf", | ||
| "application/xml", | ||
| "font/eot", | ||
| "font/opentype", | ||
| "font/otf", | ||
| "image/vnd.microsoft.icon"]; | ||
| if (misc.contains(["text"], mime.split("/")[0]) || misc.contains(compressableMimes, mime.split(";")[0])) { | ||
| return true; | ||
| } | ||
| return false; | ||
| } | ||
|
|
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| /** | ||
| * Checks if response could be cacheable, but isn't due to lack of cache header. | ||
| * @param {Entry} entry - the waterfall entry. | ||
| * @returns {boolean} | ||
| */ | ||
| export function hasCacheIssue(entry: Entry) { | ||
| if (entry.request.method.toLowerCase() !== "get") { | ||
| return false; | ||
| } | ||
| if (entry.response.status === 204 || !isInStatusCodeRange(entry, 200, 299)) { | ||
| return false; | ||
| } | ||
|
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| const headers = entry.response.headers; | ||
| return !(hasHeader(headers, "Cache-Control") || hasHeader(headers, "Expires")); | ||
| } | ||
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| export function hasCompressionIssue(entry: Entry, requestType: RequestType) { | ||
| const headers = entry.response.headers; | ||
| return (!hasHeader(headers, "Content-Encoding") && isCompressible(entry, requestType)); | ||
| } | ||
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| /** Checks if the ressource uses https */ | ||
| export function isSecure(entry: Entry) { | ||
| return entry.request.url.indexOf("https://") === 0; | ||
| } | ||
|
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| export function isPush(entry: Entry): boolean { | ||
| function toInt(input: string | number): number { | ||
| if (typeof input === "string") { | ||
| return parseInt(input, 10); | ||
| } else { | ||
| return input; | ||
| } | ||
| } | ||
| return toInt(entry._was_pushed) === 1; | ||
| } | ||
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| /** | ||
| * Check if the document (disregarding any initial http->https redirects) is loaded over a secure connection. | ||
| * @param {Entry[]} data - the waterfall entries data. | ||
| * @returns {boolean} | ||
| */ | ||
| export function documentIsSecure(data: Entry[]) { | ||
| const rootDocument = data.filter((e) => !e.response.redirectURL)[0]; | ||
| return isSecure(rootDocument); | ||
| } |
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