Java Utililty Methods HTTP Read

List of utility methods to do HTTP Read

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HTTP Read

Description

The list of methods to do HTTP Read are organized into topic(s).

Method

byte[] getByteaArrayFromConn(HttpURLConnection conn, boolean isSuccess)
get Bytea Array From Conn

InputStream is = conn.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buff = new byte[1024];
int bytesRead = 0;
while ((bytesRead = is.read(buff, 0, buff.length)) != -1) {
 baos.write(buff, 0, bytesRead);
byte[] bytes = baos.toByteArray();
...

byte[] getContent(final HttpURLConnection con)
get Content

try {
 InputStream inputStream = con.getInputStream();
 if (inputStream != null) {
 try {
 return readStream(inputStream);
 } finally {
 inputStream.close();
} catch (IOException e) {
return null;

String getContent(final String urlString)
Gets the contents of a URL

try {
 final URL url = new URL(urlString);
 final URLConnection urlConnection = url.openConnection();
 final BufferedReader reader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
 String inputLine = "", content = "";
 while ((inputLine = reader.readLine()) != null)
 content += inputLine;
 reader.close();
...

String getContent(String urlStr)
get Content

StringBuilder sb = new StringBuilder();
InputStreamReader inputStreamReader = null;
BufferedReader br = null;
try {
 URL url = new URL(urlStr);
 URLConnection conn = url.openConnection();
 inputStreamReader = new InputStreamReader(conn.getInputStream());
 br = new BufferedReader(inputStreamReader);
...

String getContentAsString(URL url)
get Content As String

URLConnection conn = url.openConnection();
conn.connect();
InputStream in = conn.getInputStream();
Reader r = new InputStreamReader(in, "UTF-8");
int c;
StringBuffer buf = new StringBuffer();
while ((c = r.read()) != -1) {
 buf.append((char) c);
...

String getContentEncoding(URL url)
Returns the value of the content-encoding header field.

String encoding = null;
HttpURLConnection conn = null;
try {
 conn = (HttpURLConnection) url.openConnection();
 encoding = conn.getContentEncoding();
} finally {
 if (conn != null) {
 conn.disconnect();
...

String getContentFromHttpGetBasicAuth(String urlString, String username, String password)
Will return empty string in case of errors.

try {
 URL url = new URL(urlString);
 HttpURLConnection con = (HttpURLConnection) url.openConnection();
 con.setRequestMethod("GET");
 String userpass = username + ":" + password;
 String basicAuth = "Basic " + base64encode(userpass.getBytes());
 con.setRequestProperty("Authorization", basicAuth);
 InputStream is = con.getInputStream();
...

String getContentFromURL(String sURL)
get Content From URL

String content = "ERROR";
URL url = null;
try {
 url = new URL(sURL);
 HttpURLConnection connection = (HttpURLConnection) url.openConnection();
 Scanner s;
 if (connection.getResponseCode() != 200) {
 s = new Scanner(connection.getErrorStream());
...

String getContentFromURL(String url)
get Content From URL

try {
 return getContentFromURL(new URL(url));
} catch (Exception e) {
return null;

long getContentLength(URL url)
get Content Length

URLConnection conn = url.openConnection();
Long contentLength = conn.getContentLengthLong();
if (contentLength != null && contentLength >= 0) {
 return contentLength;
String contentLengthValue = conn.getHeaderField("content-length");
if (contentLengthValue != null) {
 return Long.valueOf(contentLengthValue);
...