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40 lines
1.8 KiB
JavaScript
40 lines
1.8 KiB
JavaScript
9 months ago
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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Object.defineProperty(exports, "getScriptNonceFromHeader", {
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enumerable: true,
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get: function() {
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return getScriptNonceFromHeader;
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}
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});
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const _htmlescape = require("../htmlescape");
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function getScriptNonceFromHeader(cspHeaderValue) {
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var _directive_split_slice_map_find;
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const directives = cspHeaderValue// Directives are split by ';'.
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.split(";").map((directive)=>directive.trim());
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// First try to find the directive for the 'script-src', otherwise try to
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// fallback to the 'default-src'.
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const directive = directives.find((dir)=>dir.startsWith("script-src")) || directives.find((dir)=>dir.startsWith("default-src"));
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// If no directive could be found, then we're done.
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if (!directive) {
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return;
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}
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// Extract the nonce from the directive
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const nonce = (_directive_split_slice_map_find = directive.split(" ")// Remove the 'strict-src'/'default-src' string, this can't be the nonce.
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.slice(1).map((source)=>source.trim())// Find the first source with the 'nonce-' prefix.
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.find((source)=>source.startsWith("'nonce-") && source.length > 8 && source.endsWith("'"))) == null ? void 0 : _directive_split_slice_map_find.slice(7, -1);
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// If we could't find the nonce, then we're done.
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if (!nonce) {
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return;
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}
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// Don't accept the nonce value if it contains HTML escape characters.
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// Technically, the spec requires a base64'd value, but this is just an
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// extra layer.
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if (_htmlescape.ESCAPE_REGEX.test(nonce)) {
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throw new Error("Nonce value from Content-Security-Policy contained HTML escape characters.\nLearn more: https://nextjs.org/docs/messages/nonce-contained-invalid-characters");
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}
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return nonce;
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}
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//# sourceMappingURL=get-script-nonce-from-header.js.map
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