I'm trying to make a call to the Product Advertising API, but I still get the same error.
InvalidParameterValue
Value 2018-12-02T16%3A37%3A08.174%2B0000 for parameter Timestamp is invalid. Reason: Must be in ISO8601 format.7c46e224-8e98-4909-986b-cbedb9dd4d15
I've read the various posts related to the error found but none of the solutions seem to work. Below is the code I use:
public class SignedRequestsHelper { private static final String UTF8_CHARSET = "UTF-8"; /** * The HMAC algorithm required by Amazon */ private static final String HMAC_SHA256_ALGORITHM = "HmacSHA256"; /** * This is the URI for the service, don't change unless you really know * what you're doing. */ private static final String REQUEST_URI = "/onca/xml"; /** * The sample uses HTTP GET to fetch the response. If you changed the sample * to use HTTP POST instead, change the value below to POST. */ private static final String REQUEST_METHOD = "GET"; private String endpoint = null; private String awsAccessKeyId = null; private String awsSecretKey = null; private SecretKeySpec secretKeySpec = null; private Mac mac = null; /** * You must provide the three values below to initialize the helper. * * @param endpoint Destination for the requests. * @param awsAccessKeyId Your AWS Access Key ID * @param awsSecretKey Your AWS Secret Key */ public SignedRequestsHelper( String endpoint, String awsAccessKeyId, String awsSecretKey ) throws IllegalArgumentException, UnsupportedEncodingException, NoSuchAlgorithmException, InvalidKeyException { if (null == endpoint || endpoint.length() == 0) { throw new IllegalArgumentException("endpoint is null or empty"); } if (null == awsAccessKeyId || awsAccessKeyId.length() == 0) { throw new IllegalArgumentException("awsAccessKeyId is null or empty"); } if (null == awsSecretKey || awsSecretKey.length() == 0) { throw new IllegalArgumentException("awsSecretKey is null or empty"); } this.endpoint = endpoint.toLowerCase(); this.awsAccessKeyId = awsAccessKeyId; this.awsSecretKey = awsSecretKey; byte[] secretyKeyBytes = this.awsSecretKey.getBytes(UTF8_CHARSET); this.secretKeySpec = new SecretKeySpec(secretyKeyBytes, HMAC_SHA256_ALGORITHM); this.mac = Mac.getInstance(HMAC_SHA256_ALGORITHM); this.mac.init(this.secretKeySpec); } /** * The construct is private since we'd rather use getInstance() */ private SignedRequestsHelper() {} /** * This method signs requests in hashmap form. It returns a URL that should * be used to fetch the response. The URL returned should not be modified in * any way, doing so will invalidate the signature and Amazon will reject * the request. */ public String sign(Map<String, String> params) { // Let's add the AWSAccessKeyId and Timestamp parameters to the request. params.put("AWSAccessKeyId", this.awsAccessKeyId); params.put("Timestamp", this.timestamp()); // The parameters need to be processed in lexicographical order, so we'll // use a TreeMap implementation for that. SortedMap<String, String> sortedParamMap = new TreeMap<String, String>(params); // get the canonical form the query string String canonicalQS = this.canonicalize(sortedParamMap); // create the string upon which the signature is calculated String toSign = REQUEST_METHOD + "\n" + this.endpoint + "\n" + REQUEST_URI + "\n" + canonicalQS; // get the signature String hmac = this.hmac(toSign); String sig = this.percentEncodeRfc3986(hmac); // construct the URL String url = "http://" + this.endpoint + REQUEST_URI + "?" + canonicalQS + "&Signature=" + sig; return url; } /** * This method signs requests in query-string form. It returns a URL that * should be used to fetch the response. The URL returned should not be * modified in any way, doing so will invalidate the signature and Amazon * will reject the request. */ public String sign(String queryString) { // let's break the query string into it's constituent name-value pairs Map<String, String> params = this.createParameterMap(queryString); // then we can sign the request as before return this.sign(params); } /** * Compute the HMAC. * * @param stringToSign String to compute the HMAC over. * @return base64-encoded hmac value. */ private String hmac(String stringToSign) { String signature = null; byte[] data; byte[] rawHmac; try { data = stringToSign.getBytes(UTF8_CHARSET); rawHmac = mac.doFinal(data); Base64 encoder = new Base64(); signature = new String(encoder.encode(rawHmac)); } catch (UnsupportedEncodingException e) { throw new RuntimeException(UTF8_CHARSET + " is unsupported!", e); } return signature; } /** * Generate a ISO-8601 format timestamp as required by Amazon. * * @return ISO-8601 format timestamp. */ private String timestamp() { String timestamp = null; Calendar cal = Calendar.getInstance(); DateFormat dfm = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSSZZ"); dfm.setTimeZone(TimeZone.getTimeZone("GMT")); timestamp = dfm.format(cal.getTime()); return timestamp; } /** * Canonicalize the query string as required by Amazon. * * @param sortedParamMap Parameter name-value pairs in lexicographical order. * @return Canonical form of query string. */ private String canonicalize(SortedMap<String, String> sortedParamMap) { if (sortedParamMap.isEmpty()) { return ""; } StringBuffer buffer = new StringBuffer(); Iterator<Map.Entry<String, String>> iter = sortedParamMap.entrySet().iterator(); while (iter.hasNext()) { Map.Entry<String, String> kvpair = iter.next(); buffer.append(percentEncodeRfc3986(kvpair.getKey())); buffer.append("="); buffer.append(percentEncodeRfc3986(kvpair.getValue())); if (iter.hasNext()) { buffer.append("&"); } } String cannoical = buffer.toString(); return cannoical; } /** * Percent-encode values according the RFC 3986. The built-in Java * URLEncoder does not encode according to the RFC, so we make the * extra replacements. * * @param s decoded string * @return encoded string per RFC 3986 */ private String percentEncodeRfc3986(String s) { String out; try { out = URLEncoder.encode(s, UTF8_CHARSET) .replace("+", "%20") .replace("*", "%2A") .replace("%7E", "~"); } catch (UnsupportedEncodingException e) { out = s; } return out; } /** * Takes a query string, separates the constituent name-value pairs * and stores them in a hashmap. * * @param queryString * @return */ private Map<String, String> createParameterMap(String queryString) { Map<String, String> map = new HashMap<String, String>(); String[] pairs = queryString.split("&"); for (String pair: pairs) { if (pair.length() < 1) { continue; } String[] tokens = pair.split("=",2); for(int j=0; j<tokens.length; j++) { try { tokens[j] = URLDecoder.decode(tokens[j], UTF8_CHARSET); } catch (UnsupportedEncodingException e) { } } switch (tokens.length) { case 1: { if (pair.charAt(0) == '=') { map.put("", tokens[0]); } else { map.put(tokens[0], ""); } break; } case 2: { map.put(tokens[0], tokens[1]); break; } } } return map; } } @Service public class ProductService { private static final String ASSOCIATE_TAG = "TAG"; private static final String BASE_URL = ""; private final SignedRequestsHelper signedRequestsHelper; private final WebClient webClient; public ProductService(SignedRequestsHelper signedRequestsHelper, WebClient.Builder webClientBuilder) { this.signedRequestsHelper = signedRequestsHelper; HttpClient httpClient = HttpClient.create() .tcpConfiguration(tcpClient -> tcpClient.proxy(proxy -> proxy.type(ProxyProvider.Proxy.HTTP).host("localhost").port(8888))); ReactorClientHttpConnector connector = new ReactorClientHttpConnector(httpClient); this.webClient = webClientBuilder.baseUrl("http://" + PAApiConfig.ENDPOINT).clientConnector(connector).build(); } public String getRequest() { String requestUrl = null; Map<String, String> params = new HashMap<>(); params.put("AssociateTag", "lucaorlando00-21"); params.put("BrowseNode", "1480106031"); params.put("Operation", "ItemSearch"); params.put("ResponseGroup", "Images,ItemAttributes,OfferFull"); params.put("SearchIndex", "Beauty"); params.put("Service", "AWSECommerceService"); params.put("Condition", "New"); params.put("Availability", "Available"); params.put("IncludeReviewsSummary", "true"); return signedRequestsHelper.sign(params); } @PostConstruct public void tt() { this.webClient .get() .uri(getRequest()) // .header(HttpHeaders.ACCEPT, MediaType.APPLICATION_XML_VALUE) .header(HttpHeaders.ACCEPT, "text/plain, */*; q=0.01") //.header(HttpHeaders.ACCEPT_ENCODING, "gzip, deflate") .header(HttpHeaders.ACCEPT_LANGUAGE, "it-IT,it;q=0.9,en-US;q=0.8,en;q=0.7") .retrieve() .bodyToMono(String.class) .doOnError(throwable -> ((WebClientResponseException)throwable).getResponseBodyAsString()) .subscribe(); } }