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edsapi-simple-app.php
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edsapi-simple-app.php
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<?php
/************************************
EDS API SimplePHP Demo App
This PHP is meant for educational and testing purposes.
If you are starting to develop a robust, production, object oriented
app to access your EDS implementation then we recommend you use the
PHP Application Sample as your starting point.
Author: Claus Wolf <cwolf@ebsco.com>
Date: 2021-05-24
Copyright 2014-2021 EBSCO Information Services
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*************************************/
?>
<?php
session_start();
$path = 'edsapi-simple-app.php';
class EBSCOException extends Exception { }
class Functions
{
/*Error codes defined by EDS API*/
const EDS_UNKNOWN_PARAMETER = 100;
const EDS_INCORRECT_PARAMETER_FORMAT = 101;
const EDS_INVALID_PARAMETER_INDEX = 102;
const EDS_MISSING_PARAMETER = 103;
const EDS_AUTH_TOKEN_INVALID = 104;
const EDS_INCORRECT_ARGUMENTS_NUMBER = 105;
const EDS_UNKNOWN_ERROR = 106;
const EDS_AUTH_TOKEN_MISSING = 107;
const EDS_SESSION_TOKEN_MISSING = 108;
const EDS_SESSION_TOKEN_INVALID = 109;
const EDS_INVALID_RECORD_FORMAT = 110;
const EDS_UNKNOWN_ACTION = 111;
const EDS_INVALID_ARGUMENT_VALUE = 112;
const EDS_CREATE_SESSION_ERROR = 113;
const EDS_REQUIRED_DATA_MISSING = 114;
const EDS_TRANSACTION_LOGGING_ERROR = 115;
const EDS_DUPLICATE_PARAMETER = 116;
const EDS_UNABLE_TO_AUTHENTICATE = 117;
const EDS_SEARCH_ERROR = 118;
const EDS_INVALID_PAGE_SIZE = 119;
const EDS_SESSION_SAVE_ERROR = 120;
const EDS_SESSION_ENDING_ERROR = 121;
const EDS_CACHING_RESULTSET_ERROR = 122;
/**
* HTTP status codes constants
* http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
*/
const HTTP_OK = 200;
const HTTP_BAD_REQUEST = 400;
const HTTP_NOT_FOUND = 404;
const HTTP_INTERNAL_SERVER_ERROR = 500;
// This app uses the REST version of the API (HTTP Post for Authenticate, and HTTP GET for other API calls)
private static $end_point = 'https://eds-api.ebscohost.com/edsapi/rest';
private static $authentication_end_point = 'https://eds-api.ebscohost.com/Authservice/rest';
//Enter your credentials here
private static $userID = ""; // required if not using IPAuth
private static $password = ""; // required if not using IPAuth
private static $interfaceID = ""; // optional
private static $profile = ""; // required, e.g. edsapi
private static $orgID = ""; // optional
private static $guest = "y"; // y | n => unless you have protected this script, use y
private static $useIPAuth = "n"; // y if Server IPs are registered in EBSCOAdmin / n if using userID && password (see above)
private static $imageQuickView = "y"; // y | n => requesting Image Quick View
//define, which related content feature you would like
// rs = ResearchStarter; emp = Exact Match Plcard; comma separated value to request multiple (e.g. rs,emp)
private static $relatedContent = "rs,emp";
//define, whether you would like EBSCO Discovery Service to suggest spelling corrections
private static $autoSuggest = "y"; // options y / n
//define, whether you would like EBSCO Discovery Service to autocorrect spelling mistakes
//allow for override, when you want to search the original spelling
private static $autoCorrect = "y";
public function useAutoCorrect(){
if(isset($_GET["autocorrect"]) && strip_tags($_GET["autocorrect"]) == ("y" || "n")){
$autoCorrect = trim(strip_tags($_GET["autocorrect"]));
}
else{
$autoCorrect = self::$autoCorrect; // defaults to 'y'
}
return $autoCorrect;
}
// define whether to offer autocomplete, or not
// setting n here, will basicaly only remove jQuery, jQuery UI and the
// autocomplete javascript code, but authtoken requests will continue
// to request an autocomplete token
private static $autocomplete = "y"; // y | n => enable autocomplete
public function useAutoComplete(){
if(self::$autocomplete == 'y'){
return true;
}
else{
return false;
}
}
public function isGuest(){
$guest = self::$guest;
return $guest;
}
// This function maps the radio buttons below the search box to the field codes expected by the API
public function fieldCodeSelect($term){
if($term=='Author'){
return 'AU';
}
if($term == 'title'){
return 'TI';
}
if($term == 'keyword'){
return '';
}
else{
return $term;
}
}
/*
* Get authentication token from appication scop
* Check authToen's expiration
* if expired get a new authToken and re-new the time stamp
*
* @param none
*
* @access public
*/
public function getAuthToken(){
$lockFile = fopen("lock.txt","r");
$tokenFile =fopen("token.txt","r");
while(!feof($tokenFile)){
$authToken = rtrim(fgets($tokenFile),"\n");
$timeout = rtrim(fgets($tokenFile),"\n")-600;
$timestamp = rtrim(fgets($tokenFile),"\n");
$autocompleteToken = rtrim(fgets($tokenFile),"\n");
$autocompleteUrl = rtrim(fgets($tokenFile),"\n");
$autocompleteCustId = rtrim(fgets($tokenFile),"\n");
}
fclose($tokenFile);
if(time()-$timestamp>=$timeout){
// Lock check.
if(flock($lockFile, LOCK_EX)){
$tokenFile = fopen("token.txt","w+");
$result = $this->requestAuthenticationToken();
fwrite($tokenFile, $result['authenticationToken']."\n");
fwrite($tokenFile, $result['authenticationTimeout']."\n");
fwrite($tokenFile, $result['authenticationTimeStamp']."\n");
fwrite($tokenFile, $result['autocompleteToken']."\n");
fwrite($tokenFile, $result['autocompleteUrl']."\n");
fwrite($tokenFile, $result['autocompleteCustId']);
fclose($tokenFile);
return $result['authenticationToken'];
}else{
return $authToken;
}
}else{
return $authToken;
}
fclose($lockFile);
}
// This function calls the UID Authenticate method using HTTP POST and fetches the auth token
public function requestAuthenticationToken()
{
if(self::$useIPAuth != 'y'){
$url = self::$authentication_end_point . '/UIDAuth';
$userID = self::$userID;
$password = self::$password;
$interfaceID = self::$interfaceID;
// Add the body of the request. Important. UserId and Password are to the API profile
// UserID: customer’s EDS API user ID
// Password: customer’s EDS API password
// InterfaceID: optional string, use “api” (check with Michelle)
// Options -> Option = Autocomplete - request always for demo
$params =<<<BODY
<UIDAuthRequestMessage xmlns="http://www.ebscohost.com/services/public/AuthService/Response/2012/06/01">
<UserId>$userID</UserId>
<Password>$password</Password>
<InterfaceId>$interfaceID</InterfaceId>
<Options>
<Option>autocomplete</Option>
</Options>
</UIDAuthRequestMessage>
BODY;
// Set the content type to 'application/xml'. Important, otherwise the server won't understand the request.
$headers = array(
'Content-Type: application/xml',
'Conent-Length: ' . strlen($params)
);
}
else {
$url = self::$authentication_end_point . '/ipauth';
$params =<<<BODY
<IPAuthRequestMessage xmlns="http://www.ebscohost.com/services/public/AuthService/Response/2012/06/01" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<Options>
<Option>autocomplete</Option>
</Options>
</IPAuthRequestMessage>
BODY;
$headers = array('Content-Type: application/xml','Conent-Length: ' . strlen($params));
}
$response = $this->sendHTTPRequest($url, $params, $headers, 'POST');
$response = $this->buildAuthenticationToken($response);
return $response;
}
// This function receives the XML response to the Authenticate method call, and creates a auth token
private function buildAuthenticationToken($response)
{
$token = (string) $response->AuthToken;
$timeout = (integer) $response->AuthTimeout;
$autocompleteToken = (string) $response->Autocomplete->Token;
$autocompleteUrl = (string) $response->Autocomplete->Url;
$autocompleteCustId = (string) $response->Autocomplete->CustId;
$result = array(
'authenticationToken' => $token,
'authenticationTimeout' => $timeout,
'authenticationTimeStamp'=> time(),
'autocompleteToken' => $autocompleteToken,
'autocompleteUrl' => $autocompleteUrl,
'autocompleteCustId' => $autocompleteCustId
);
return $result;
}
public function getAutoCompleteVariables(){
$lockFile = fopen("lock.txt","r");
$tokenFile =fopen("token.txt","r");
while(!feof($tokenFile)){
$authToken = rtrim(fgets($tokenFile),"\n");
$timeout = rtrim(fgets($tokenFile),"\n")-600;
$timestamp = rtrim(fgets($tokenFile),"\n");
$autocompleteToken = rtrim(fgets($tokenFile),"\n");
$autocompleteUrl = rtrim(fgets($tokenFile),"\n");
$autocompleteCustId = rtrim(fgets($tokenFile),"\n");
}
fclose($tokenFile);
return array($autocompleteToken, $autocompleteUrl, $autocompleteCustId);
}
/**
* Get session token for a profile
* If session token is not available
* a new session token will be generated
*
* @param Authentication token, Profile
* @access public
*/
public function getSessionToken($authenToken, $invalid='n'){
$token = '';
if(isset($_COOKIE['Guest'])){
if($invalid=='y'){
$sessionToken = $this->requestSessionToken($authenToken);
$_SESSION['sessionToken']= $sessionToken;
}
$token = $_SESSION['sessionToken'];
}else{
$sessionToken = $this->requestSessionToken($authenToken);
$_SESSION['sessionToken']=$sessionToken;
setcookie("Guest", 'Cookie' , 0);
$token = $sessionToken;
}
return $token;
}
// This function calls the CreateSession method using HTTP GET and fetches the session token
public function requestSessionToken($authenToken)
{
$url = self::$end_point . '/CreateSession';
$profile = self::$profile;
$orgID = self::$orgID;
$guest = self::$guest;
// Add the HTTP query parameters
// if you are a vendor working on behalf of a customer then “org” must be filled in per your agreement
// please note proper use of the “guest” setting per Terms Of Use i.e. must be set to ‘y’ if you are not making sufficient effort to authenticate users to your institution
$params = array(
'profile' => $profile,
'org' => $orgID,
'guest' => $guest
);
$headers = array(
'x-authenticationToken: ' . $authenToken
);
$response = $this->sendHTTPRequest($url, $params, $headers);
$response = $this->buildSessionToken($response);
return $response;
}
// This function receives the XML response to the CreateSession method call, and creates a session token
private function buildSessionToken($response)
{
$token = (string) $response->SessionToken;
return $token;
}
// This function calls the Search method with the user’s query
public function requestSearch()
{
if(isset($_REQUEST['back'])&&isset($_SESSION['results'])){
//Cach search response for further use
$response=$_SESSION['results'];
return $response;
}else{
try{
$url = self::$end_point . '/Search';
// Build the arguments for the Search API method
$lookfor = str_replace('"','',$_REQUEST['lookfor']);
$search = array(
'lookfor' => $lookfor,
'type' => $_REQUEST['type']
);
/*
* Set search parameters for the Search API method
*/
$start = isset($_REQUEST['page']) ? $_REQUEST['page'] : 1;
$limit = isset($_REQUEST['limit'])?$_REQUEST['limit']:20;
$sortBy = isset($_REQUEST['sortBy'])?$_REQUEST['sortBy']:'relevance';
$amount = isset($_REQUEST['amount'])?$_REQUEST['amount']:'detailed';
$publicationid = isset($_REQUEST['pubtypeid'])?$_REQUEST['pubtypeid']:''; // provide support for EMP Publication Search
$mode = 'all';
$query = array();
// Basic search
if(!empty($search['lookfor'])) {
// escaping as needed
$term = urldecode($search['lookfor']);
$term = str_replace('"', '', $term); // Temporary
$term = str_replace(',',"\,",$term);
$term = str_replace(':', '\:', $term);
$term = str_replace('(', '\(', $term);
$term = str_replace(')', '\)', $term);
$type = $search['type'];
// Transform a Search type into an EBSCO search field code
$tag = $this->fieldCodeSelect($type);
if($tag!=null){
$query_str = implode(":", array($tag, $term));
// if user elects to run an Author Search, improve relevancy by setting search mode to Boolean/Phrase
if(strtoupper($tag) === 'AU'){
$mode = 'bool';
}
}else{
$query_str = $term;
}
$query["query"] = $query_str;
// No search term, return an empty array
} else {
$results = array();
return $results;
}
$query['action'] = array();
array_push($query['action'], "GoToPage($start)");
// Add the HTTP query params
$params = array(
'sort' => $sortBy,
'searchmode' => $mode,
'view' => $amount,
'includefacets' => 'n',
'resultsperpage' => $limit,
'pagenumber' => $start,
'highlight' => 'y',
'relatedcontent' => self::$relatedContent, // request related content
'autosuggest' => self::$autoSuggest, // request spelling corrections
'autocorrect' => $this->useAutoCorrect(), // request autocorect feature
'publicationid' => $publicationid,
'includeimagequickview' => self::$imageQuickView // request image quick view
);
$params = array_merge($params, $query);
$authenticationToken = $this ->getAuthToken();
$sessionToken = $this ->getSessionToken($authenticationToken);
$headers = array(
'x-authenticationToken: ' . $authenticationToken,
'x-sessionToken: ' . $sessionToken
);
$response = '';
try{
$response = $this->sendHTTPRequest($url, $params, $headers);
}catch(EBSCOException $e) {
try {
// Retry the request if there were authentication errors
$code = $e->getCode();
switch ($code) {
case Functions::EDS_AUTH_TOKEN_INVALID:
$_SESSION['authToken'] = $this->getAuthToken();
$_SESSION['sessionToken'] = $this ->getSessionToken($_SESSION['authToken'],'y');
return $this->requestSearch();
break;
case Functions::EDS_SESSION_TOKEN_INVALID:
$_SESSION['sessionToken'] = $this ->getSessionToken($authenticationToken,'y');
return $this->requestSearch();
break;
default:
$result = array(
'error' => $e->getMessage()
);
return $result;
break;
}
} catch(Exception $e) {
$result = array(
'error' => $e->getMessage()
);
return $result;
}
}
$response = $this->buildSearch($response);
//Cach search response for further use
$_SESSION['results'] = $response;
return $response;
}catch(Exception $e) {
$result = array(
'error' => $e->getMessage()
);
return $result;
}
}
}
// This function uses the Search XML response to create an array that stores the search results data
private function buildSearch($response)
{
$hits = (integer) $response->SearchResult->Statistics->TotalHits;
$records = array();
$relatedContent = array();
$relatedPublication = array();
$autoSuggest = array();
$autoCorrected = array();
if ($hits > 0) {
$records = $this->buildRecords($response);
$relatedContent = $this->getRelatedContent($response);
$relatedPublication = $this->getRelatedPublication($response);
$autoSuggest = $this->getAutoSuggest($response);
$autoCorrected = $this->getAutoCorrect($response);
}
$results = array(
'recordCount' => $hits,
'records' => $records,
'relatedContent' => $relatedContent,
'relatedPublication' => $relatedPublication,
'autoSuggest' => $autoSuggest,
'autoCorrected' => $autoCorrected
);
return $results;
}
//this function uses the Search XML response to get an array of spelling suggestions
private function getAutoSuggest($response){
$suggestedTerms = Array();
if (self::$autoSuggest == 'y' && isset($response->SearchResult->AutoSuggestedTerms)){
foreach($response->SearchResult->AutoSuggestedTerms->AutoSuggestedTerm as $spellSuggestion){
$suggestedTerms[] = $spellSuggestion;
}
}
return $suggestedTerms;
}
//this function uses the Search XML response to get the autocorrected term
private function getAutoCorrect($response){
$suggestedTerms = Array();
$autoCorrectTest = $this->useAutoCorrect();
if($autoCorrectTest == 'y' && isset($response->SearchResult->AutoCorrectedTerms)){
foreach($response->SearchResult->AutoCorrectedTerms->AutoCorrectedTerm as $spellSuggestion){
$suggestedTerms[] = $spellSuggestion;
}
}
return $suggestedTerms;
}
// This function uses the Search XML response to create an array of related content entries
private function getRelatedContent($response){
$results = array();
if(isset($response->SearchResult->RelatedContent->RelatedRecords->RelatedRecord)){
$relatedRecords = $response->SearchResult->RelatedContent->RelatedRecords->RelatedRecord;
foreach($relatedRecords as $relatedRecord) {
//var_dump($relatedRecord);
$result = array();
$result['Type'] = (string)$relatedRecord->Type;
$result['Label'] = (string)$relatedRecord->Label;
$result['Record'] = array();
foreach($relatedRecord->Records->Record as $rRecord) {
$tmpRecord = array();
$tmpRecord['DbId'] = (string)$rRecord->Header->DbId;
$tmpRecord['An'] = (string)$rRecord->Header->An;
$tmpRecord['PLink'] = (string)$rRecord->PLink;
if(isset($rRecord->ImageInfo->CoverArt->Target)){
$tmpRecord['Thumbnail'] = (string)$rRecord->ImageInfo->CoverArt->Target;
}
else {
$tmpRecord['Thumbnail'] = '';
}
foreach($rRecord->Items->Item as $item) {
if($item->Label == 'Title') {
$tmpRecord['Title'] = (string)$item->Data;
}
elseif($item->Label == 'Authors') {
$tmpRecord['Authors'] = (string)$item->Data;
}
elseif($item->Label == 'Source') {
$tmpRecord['Source'] = (string)$item->Data;
}
elseif($item->Label == 'Abstract'){
$tmpRecord['Abstract'] = (string)$item->Data;
}
}
$result['Record'][] = $tmpRecord;
}
$results[] = $result;
}
return $results;
}
else {
return FALSE;
}
}
// This function uses the Search XML response to create an array of related content entries
private function getRelatedPublication($response){
$results = array();
if(isset($response->SearchResult->RelatedContent->RelatedPublications)){
foreach($response->SearchResult->RelatedContent->RelatedPublications->children('http://epnet.com/webservices/EbscoApi/Publication/Contracts')->RelatedPublication as $publication){
$result = array();
$result['Type'] = (string)$publication->Type;
$result['Label'] = (string)$publication->Label;
foreach($publication->PublicationRecords->Record as $pubRec){
$tmpRecord = array();
$tmpRecord['PublicationId'] = (string)$pubRec->Header->PublicationId;
$tmpRecord['IsSearchable'] = (string)$pubRec->Header->IsSearchable;
$tmpRecord['PLink'] = (string)$pubRec->PLink;
foreach($pubRec->Items->Item as $item){
if($item->Label == 'Title'){
$tmpRecord['Title'] = (string)$item->Data;
}
elseif($item->Label == 'ISSN'){
$tmpRecord['ISSN'] = (string)$item->Data;
}
}
foreach ($pubRec->FullTextHoldings->FullTextHolding as $ft) {
$tmpFTH['URL'] = (string)$ft->URL;
$tmpFTH['Name'] = (string)$ft->Name;
$tmpRecord['FullText'][] = $tmpFTH;
}
}
$result['Record'][] = $tmpRecord;
}
return $result;
}
else {
return FALSE;
}
}
// This function uses the Search XML response to create an array of the records in the results page
private function buildRecords($response)
{
$results = array();
$records = $response->SearchResult->Data->Records->Record;
foreach ($records as $record) {
$result = array();
$result['pubType'] = $record -> Header-> PubType?(string)$record ->Header-> PubType:'';
$result['PubTypeId']= $record->Header->PubTypeId? (string) $record->Header->PubTypeId:'';
$result['queryUrl'] = $response->SearchRequestGet->QueryString?(string)$response->SearchRequestGet->QueryString:'';
$result['ResultId'] = $record->ResultId ? (integer) $record->ResultId : '';
$result['DbId'] = $record->Header->DbId ? (string) $record->Header->DbId : '';
$result['DbLabel'] = $record->Header->DbLabel ? (string) $record->Header->DbLabel:'';
$result['An'] = $record->Header->An ? (string) $record->Header->An : '';
$result['PLink'] = $record->PLink ? (string) $record->PLink : '';
$result['PDF'] = $record->FullText->Links ? (string) $record->FullText->Links->Link->Type : '';
$result['HTML'] = $record->FullText->Text->Availability? (string) $record->FullText->Text->Availability : '';
if (!empty($record->ImageInfo->CoverArt)) {
foreach ($record->ImageInfo->CoverArt as $image) {
$size = (string) $image->Size;
$target = (string) $image->Target;
$result['ImageInfo'][$size] = $target;
}
} else {
$result['ImageInfo'] = '';
}
$result['FullText'] = $record->FullText ? (string) $record->FullText : '';
if ($record->CustomLinks) {
$result['CustomLinks'] = array();
foreach ($record->CustomLinks->CustomLink as $customLink) {
$category = $customLink->Category ? (string) $customLink->Category : '';
$icon = $customLink->Icon ? (string) $customLink->Icon : '';
$mouseOverText = $customLink->MouseOverText ? (string) $customLink->MouseOverText : '';
$name = $customLink->Name ? (string) $customLink->Name : '';
$text = $customLink->Text ? (string) $customLink->Text : '';
$url = $customLink->Url ? (string) $customLink->Url : '';
$result['CustomLinks'][] = array(
'Category' => $category,
'Icon' => $icon,
'MouseOverText' => $mouseOverText,
'Name' => $name,
'Text' => $text,
'Url' => $url
);
}
}
if($record->Items) {
$result['Items'] = array();
foreach ($record->Items->Item as $item) {
$label = $item->Label ? (string) $item->Label : '';
$group = $item->Group ? (string) $item->Group : '';
$data = $item->Data ? (string) $item->Data : '';
$result['Items'][$group][] = array(
'Label' => $label,
'Group' => $group,
'Data' => $this->toHTML($data, $group)
);
}
}
if($record->ImageQuickViewItems->ImageQuickViewItem){
$result['iqv'] = array();
foreach($record->ImageQuickViewItems->ImageQuickViewItem as $iqv){
$dbcode = $iqv->DbId ? (string) $iqv->DbId : '';
$an = $iqv->An ? (string) $iqv->An : '';
$type = $iqv->Type ? (string) $iqv->Type : '';
$url = $iqv->Url ? (string) $iqv->Url : '';
$result['iqv'][] = array(
'DbId' => $dbcode,
'An' => $an,
'Type' => $type,
'url' => $url
);
}
}
$results[] = $result;
}
return $results;
}
// This function calls the Retrieve method with the AN and Database ID of the record that the user clicked on
public function requestRetrieve(){
try{
$url = self::$end_point . '/Retrieve';
$db = $_REQUEST['db'];
$an = $_REQUEST['an'];
if(isset($_REQUEST['lookfor'])){
$highlight = $_REQUEST['lookfor'];
$highlight = str_replace(array(" ","&","-"),array(" "),$highlight);
}
else{
$highlight = '';
}
$authenticationToken = $this ->getAuthToken();
$sessionToken = $this ->getSessionToken($authenticationToken);
$params['an'] = $an;
$params['dbid'] = $db;
$params['highlightterms'] = $highlight;
$headers = array(
'x-authenticationToken: ' . $authenticationToken,
'x-sessionToken: ' . $sessionToken
);
$response="";
try{
$response = $this->sendHTTPRequest($url, $params, $headers);
}catch(EBSCOException $e) {
try {
// Retry the request if there were authentication errors
$code = $e->getCode();
switch ($code) {
case Functions::EDS_AUTH_TOKEN_INVALID:
$_SESSION['authToken'] = $this->getAuthToken();
$_SESSION['sessionToken'] = $this ->getSessionToken($_SESSION['authToken'],'y');
return $this->requestRetrieve();
break;
case Functions::EDS_SESSION_TOKEN_INVALID:
$_SESSION['sessionToken'] = $this ->getSessionToken($authenticationToken,'y');
return $this->requestRetrieve();
break;
default:
$result = array(
'error' => $e->getMessage()
);
return $result;
break;
}
} catch(Exception $e) {
$result = array(
'error' => $e->getMessage()
);
return $result;
}
}
$response = $this->buildRetrieve($response);
return $response;
} catch(Exception $e) {
$result = array(
'error' => $e->getMessage()
);
return $result;
}
}
public function requestExportRetrieve(){
try{
$url = self::$end_point . '/ExportFormat';
$db = $_REQUEST['db'];
$an = $_REQUEST['an'];
$format = $_REQUEST['format'];
$authenticationToken = $this ->getAuthToken();
$sessionToken = $this ->getSessionToken($authenticationToken);
$params['an'] = $an;
$params['dbid'] = $db;
$params['format'] = $format;
$headers = array(
'x-authenticationToken: ' . $authenticationToken,
'x-sessionToken: ' . $sessionToken
);
$response="";
try{
$response = $this->sendHTTPRequest($url, $params, $headers);
}catch(EBSCOException $e) {
try {
// Retry the request if there were authentication errors
$code = $e->getCode();
switch ($code) {
case Functions::EDS_AUTH_TOKEN_INVALID:
$_SESSION['authToken'] = $this->getAuthToken();
$_SESSION['sessionToken'] = $this ->getSessionToken($_SESSION['authToken'],'y');
return $this->requestExportRetrieve();
break;
case Functions::EDS_SESSION_TOKEN_INVALID:
$_SESSION['sessionToken'] = $this ->getSessionToken($authenticationToken,'y');
return $this->requestExportRetrieve();
break;
default:
$result = array(
'error' => $e->getMessage()
);
return $result;
break;
}
} catch(Exception $e) {
$result = array(
'error' => $e->getMessage()
);
return $result;
}
}
if(isset($response->Data) && !empty($response->Data)){
$data['data'] = $response->Data;
}
else{
$data['error'] = 'failed to acquire RIS Data';
}
return $data;
} catch(Exception $e) {
$result = array(
'error' => $e->getMessage()
);
return $result;
}
}
// This function uses the Retrieve XML response to create an array of the record in the detailed record page
private function buildRetrieve($response)
{
$record = $response->Record;
if ($record) {
$record = $record[0]; // there is only one record
}
$result = array();
$result['AccessLevel'] = $record->Header -> AccessLevel?(string)$record->Header -> AccessLevel:'';
$result['pubType'] = $record -> Header-> PubType? (string)$record -> Header-> PubType:'';
$result['PubTypeId']= $record->Header->PubTypeId? (string) $record->Header->PubTypeId:'';
$result['DbId'] = $record->Header->DbId ? (string) $record->Header->DbId : '';
$result['DbLabel'] = $record->Header->DbLabel ? (string) $record->Header->DbLabel:'';
$result['An'] = $record->Header->An ? (string) $record->Header->An : '';
$result['PLink'] = $record->PLink ? (string) $record->PLink : '';
$result['pdflink'] = $record->FullText->Links ? (string) $record->FullText->Links->Link->Url : '';
$result['PDF'] = $record->FullText->Links ? (string) $record->FullText->Links->Link->Type : '';
$result['HTML'] = $record->FullText->Text->Availability? (string) $record->FullText->Text->Availability : '';
$value = $record->FullText->Text->Value ? (string) $record->FullText->Text->Value : '';
$result['htmllink'] = $this->toHTML($value,$group = '');
if (!empty($record->ImageInfo->CoverArt)) {
foreach ($record->ImageInfo->CoverArt as $image) {
$size = (string) $image->Size;
$target = (string) $image->Target;
$result['ImageInfo'][$size] = $target;
}
} else {
$result['ImageInfo'] = '';
}
$result['FullText'] = $record->FullText ? (string) $record->FullText : '';
if ($record->CustomLinks) {
$result['CustomLinks'] = array();
foreach ($record->CustomLinks->CustomLink as $customLink) {
$category = $customLink->Category ? (string) $customLink->Category : '';
$icon = $customLink->Icon ? (string) $customLink->Icon : '';
$mouseOverText = $customLink->MouseOverText ? (string) $customLink->MouseOverText : '';
$name = $customLink->Name ? (string) $customLink->Name : '';
$text = $customLink->Text ? (string) $customLink->Text : '';
$url = $customLink->Url ? (string) $customLink->Url : '';
$result['CustomLinks'][] = array(
'Category' => $category,
'Icon' => $icon,
'MouseOverText' => $mouseOverText,
'Name' => $name,
'Text' => $text,
'Url' => $url
);
}
}
if($record->Items) {
$result['Items'] = array();
foreach ($record->Items->Item as $item) {
$label = $item->Label ? (string) $item->Label : '';
$group = $item->Group ? (string) $item->Group : '';
$data = $item->Data ? (string) $item->Data : '';
$result['Items'][] = array(
'Label' => $label,
'Group' => $group,
'Data' => $this->toHTML($data, $group)
);
}
}
return $result;
}
// This function request the PDF fulltext of the record
public function requestPDF(){
$record = $this->requestRetrieve();
//Call Retrieve Method to get the PDF Link from the record
$pdfUrl = $record['pdflink'];
header('Location: '.$pdfUrl.'', true, 307);
exit;
}
// This function request the Export of the record
public function requestExport(){
$data = $this->requestExportRetrieve();
if(!isset($data['error'])){
//RIS Header & File Name set
$filename = $_GET['an'].'_'.$_GET['db'].'.ris';
header('Content-Type: application/x-research-info-systems');
header('Content-Disposition: inline; filename="'.$filename.'"');
echo $data['data'];
}
else{
echo $data['error'];
}
exit;
}
// This function is used to actually send the HTTP request and fetch the XML response from the API server
protected function sendHTTPRequest($url, $params = null, $headers = null, $method = 'GET')
{
$log = fopen('curl.log', 'w'); // for debugging cURL
// Create a cURL instance
$ch = curl_init();
// Set the cURL options
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($ch, CURLOPT_VERBOSE, true);
curl_setopt($ch, CURLOPT_STDERR, $log); // for debugging cURL
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // Temporary
curl_setopt($ch, CURLOPT_ENCODING, 'gzip,deflate'); // ensure compressed traffic is used
// Set the query parameters and the url
if (empty($params) && self::$useIPAuth != 'y') {
// Only Info request has empty parameters
curl_setopt($ch, CURLOPT_URL, $url);
} else {
// GET method
if ($method == 'GET') {
$query = http_build_query($params);
// replace query params like facet[0]=value with facet=value
$query = preg_replace('/%5B(?:[0-9]|[1-9][0-9]+)%5D=/', '=', $query);
$url .= '?' . $query;
curl_setopt($ch, CURLOPT_URL, $url);
// POST method
} else {
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
}
}
// Set the header
if (!empty($headers)) {
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
}
// Send the request
$response = curl_exec($ch);
$response = $this->errorHandling($ch,$response,$log);
return $response;
}
// This function replaces the non standard HTML tags in the API response with standard HTML
private function toHTML($data, $group = '')
{
global $path;
// Any group can be added here, but we only use Au (Author)
// Other groups, not present here, won't be transformed to HTML links
$allowed_searchlink_groups = array('Au','Su');
$allowed_link_groups = array('URL');
// Map xml tags to the HTML tags
// This is just a small list, the total number of xml tags is far more greater
$xml_to_html_tags = array(
'<jsection' => '<section',
'</jsection' => '</section',
'<highlight' => '<span class="highlight"',
'<highligh' => '<span class="highlight"', // Temporary bug fix
'</highlight>' => '</span>', // Temporary bug fix