hathi-proxy.php

<?php
/**
 *  proxy to access HathiTrust bib api via https
 */

if (!isset($_SERVER['QUERY_STRING'])) {
  echo "{}";
  exit();
}

$qs = $_SERVER['QUERY_STRING'];

if (substr($qs, 0, 4) !== "url=") {
  echo "{}";
  exit();
}

$url = substr($qs, 4);

if (substr($url, 0, 30) !== "http://catalog.hathitrust.org/") {
  echo "{}";
  exit();
}

header('Content-type', 'applcation/javascript');
$response = file_get_contents($url);
print_r($response);

hathi.js

// add url to hathiProxy hosted on https server
var hathiProxy = ""

// appends url query string param needed for hathiProxy
hathiProxy = hathiProxy + "?url="

function compose_hathi() {
	hathiContainer = document.getElementById("hathi856");
	oclcworked = null;

	if (!document.hathi497_form && !document.hathilccn498_form) {}
	else {
		if (document.hathi497_form) {
			var oclc = document.getElementById("hathi").innerHTML;
			var hathi_api_url = hathiProxy + "http://catalog.hathitrust.org/api/volumes/brief/json/oclc:" + oclc + "&callback=show_Hathi";
			var scriptLine = "%3Cscript src='" + hathi_api_url + "' type='text/javascript'%3E%3C/script%3E";
			document.write(unescape(scriptLine));
		}
		if (document.hathilccn498_form) {
			var lccn = document.getElementById("hathilccn").innerHTML;
			var hathi_api_lccn_url = hathiProxy + "http://catalog.hathitrust.org/api/volumes/brief/json/lccn:" + lccn + "&callback=show_HathiLCCN";
			var scriptLineL = "%3Cscript src='" + hathi_api_lccn_url + "' type='text/javascript'%3E%3C/script%3E";
			document.write(unescape(scriptLineL));
		}
	}
}

// Take the info returned from Hathi and do stuff with it

function show_Hathi(HathiBookInfo) {
	for (items in HathiBookInfo) {
		var HbookInfo = HathiBookInfo[items];
		if (!HbookInfo.items[0]){}
		else {
			var howmanyItems = HbookInfo.items.length;
			for (var i = 0; i < howmanyItems; i++) {
				if (HbookInfo.items[i].rightsCode in {"pd":"" , "pdus":"" , "world":""}) { 
				var urlHathi = HbookInfo.items[i].itemURL;
				var hathi_html = "<table border=\"0\" class=\"bibLinks\"><tr><th><span class=\"linkTextHeader\">Available online:</span></th></tr><tr align=\"center\"><td><a href=\"" + urlHathi + "\" onclick=\"window.open('" + urlHathi + "'); return false;\">Full text from the HathiTrust Digital Library</a></td></tr></table>"; 
				hathiContainer.innerHTML = hathi_html;
				hathiContainer.style.display = "block";
				oclcworked = true;
				}
			}
		}
	}
}

function show_HathiLCCN(HathiBookInfo) {
	if (oclcworked == true) {return}
	for (items in HathiBookInfo) {
		var HbookInfo = HathiBookInfo[items];
		if (!HbookInfo.items[0]){}
		else {
			var howmanyItems = HbookInfo.items.length;
			for (var i = 0; i < howmanyItems; i++) {
				if (HbookInfo.items[i].rightsCode in {"pd":"" , "pdus":"" , "world":""}) { 
				var urlHathi = HbookInfo.items[i].itemURL;
				var hathi_html = "<table border=\"0\" class=\"bibLinks\"><tr><th><span class=\"linkTextHeader\">Available online:</span></th></tr><tr align=\"center\"><td><a href=\"" + urlHathi + "\" onclick=\"window.open('" + urlHathi + "'); return false;\">Full text from the HathiTrust Digital Library</a></td></tr></table>"; 
				hathiContainer.innerHTML = hathi_html;
				hathiContainer.style.display = "block";
				}
			}
		}
	}
}