42 lines
832 B
JavaScript
42 lines
832 B
JavaScript
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export const MAX_ISLAND_BODY_BYTES = 64 * 1024;
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export const MAX_ISLAND_PROP_DEPTH = 64;
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export function exceedsMaxDepth(raw, maxDepth = MAX_ISLAND_PROP_DEPTH) {
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let depth = 0;
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let inString = false;
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let escaped = false;
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for (let i = 0; i < raw.length; i++) {
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const ch = raw[i];
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if (inString) {
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if (escaped) {
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escaped = false;
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} else if (ch === "\\") {
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escaped = true;
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} else if (ch === "\"") {
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inString = false;
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}
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continue;
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}
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if (ch === "\"") {
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inString = true;
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} else if (ch === "{" || ch === "[") {
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if (++depth > maxDepth) {
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return true;
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}
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} else if (ch === "}" || ch === "]") {
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if (depth > 0) {
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depth--;
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}
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}
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}
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return false;
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}
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export function exceedsMaxBytes(raw, maxBytes = MAX_ISLAND_BODY_BYTES) {
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return Buffer.byteLength(raw, "utf8") > maxBytes;
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}
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