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Filename : parse-body.js
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import { parse } from "next/dist/compiled/content-type";
import isError from "../../../lib/is-error";
import { ApiError } from "../index";
/**
 * Parse `JSON` and handles invalid `JSON` strings
 * @param str `JSON` string
 */ function parseJson(str) {
    if (str.length === 0) {
        // special-case empty json body, as it's a common client-side mistake
        return {};
    }
    try {
        return JSON.parse(str);
    } catch (e) {
        throw new ApiError(400, "Invalid JSON");
    }
}
/**
 * Parse incoming message like `json` or `urlencoded`
 * @param req request object
 */ export async function parseBody(req, limit) {
    let contentType;
    try {
        contentType = parse(req.headers["content-type"] || "text/plain");
    } catch  {
        contentType = parse("text/plain");
    }
    const { type, parameters } = contentType;
    const encoding = parameters.charset || "utf-8";
    let buffer;
    try {
        const getRawBody = require("next/dist/compiled/raw-body");
        buffer = await getRawBody(req, {
            encoding,
            limit
        });
    } catch (e) {
        if (isError(e) && e.type === "entity.too.large") {
            throw new ApiError(413, `Body exceeded ${limit} limit`);
        } else {
            throw new ApiError(400, "Invalid body");
        }
    }
    const body = buffer.toString();
    if (type === "application/json" || type === "application/ld+json") {
        return parseJson(body);
    } else if (type === "application/x-www-form-urlencoded") {
        const qs = require("querystring");
        return qs.decode(body);
    } else {
        return body;
    }
}

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