Yahoo! テキスト解析APIへExtendScriptを利用してPOSTリクエストを送るサンプル（Mac版InDesign専用）

AccessYahooAPISample.js

if (!String.prototype.surroundQuotes) {
    String.prototype.surroundQuotes = function(q) {
        return q + this + q;
    }
}
var p = {
    url: "https://jlp.yahooapis.jp/FuriganaService/V2/furigana",
    header: {
        contentType: "application/json",
        userAgent: "Yahoo AppID: <アプリケーションID>", //ここにClientIDを記述
    },
    body: {
        id: "1234",
        jsonrpc: "2.0",
        method: "jlp.furiganaservice.furigana",
        params: {
            q: "彗星が僕の頭上を翔んだ", //実際にはInDesignからテキストを受け取る
            grade: "1"
        }
    },
};

var scpt = "do shell script " + [
    "curl",
    "-H",
    ("content-type: " + p.header.contentType).surroundQuotes("'"),
    "-A",
    p.header.userAgent.surroundQuotes("'"),
    "-X",
    "POST",
    "-d",
    getParamString(p.body).surroundQuotes("'"),
    p.url
].join(" ").surroundQuotes('"');

var result = eval("(" + app.doScript(scpt, ScriptLanguage.applescriptLanguage) + ")");

function getParamString(obj) {
    var res = [];
    for (var key in obj) {
        if (typeof(obj[key]) === "string") {
            res.push(key.surroundQuotes('\\"') + ": " + obj[key].surroundQuotes('\\"'));
        } else {
            res.push(key.surroundQuotes('\\"') + ": " + getParamString(obj[key]));
        }
    }
    return "{" + res.join(",") + "}";
}