I am sending json string in an https post request to an apache servert(request sends json data to a cgi-bin script that actually is a python script). Am using a standard cgi call -
f=open("./testfile", "w+")
f.write("usageData json = \n")
<b>form = cgi.FieldStorage()
formList = ['Data']
str = form['Data'].value
str = json.dumps(backupstr)
</b>
print backupstr
to read the json string in the url. Problem is that the script is not reading the json in the url even though the script is getting fired (the basic print statements are executing ...). This is how am sending data from the post side :
HttpsURLConnection connection = null;
try{
connection = (HttpsURLConnection)url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type",
"application/json");
connection.setRequestProperty("Content-Length", "" +
Integer.toString(jsonstring.getBytes().length));
connection.setRequestProperty("Content-Language", "en-US");
connection.setUseCaches (false);
connection.setDoInput(true);
connection.setDoOutput(true);
//Send request
DataOutputStream wr = new DataOutputStream (
connection.getOutputStream ());
//wr.writeBytes(jsonstring);
wr.writeUTF(URLEncoder.encode(jsonstring, "UTF-8"));
wr.flush ();
wr.close ();
//Get Response
InputStream is = connection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
String line;
StringBuffer response = new StringBuffer();
while((line = rd.readLine()) != null) {
response.append(line);
}
rd.close();
//response = httpClient.execute(request);
}
catch (Exception e)
{
System.out.println("Exception " + e.getMessage());
throw e;
}
I suspect am missing one or more of the connection.setRequestProperty() settings on the sending end that's why it's firing the script but not reading the json string in the url ...what am I doing wrong ...?
Related
I have a node.js which waits for post with 2 parameters (name and pass):
app.post('/login.html', function (req, res) {
log.info(req.body);
userName = req.body.name;
pass = req.body.pass;
...
}
I'm trying to send post with the 2 parameters via simple java application, but I can't see that it arrive to the node.js.
what am I missing ?
The java code:
public static void main(String[] args) {
URL url;
HttpURLConnection urlConnection = null;
try {
url = new URL("http://83.63.118.111:31011/login.html");
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setReadTimeout(10000);
urlConnection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
urlConnection.setConnectTimeout(10000);
urlConnection.setRequestMethod("POST");
urlConnection.setDoInput(true);
urlConnection.setDoOutput(true);
OutputStream os = urlConnection.getOutputStream();
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
String str = "name='root'&pass='123456'";
//System.out.print(str);
writer.write(str);
writer.flush();
Thread.sleep(100);
writer.close();
os.close();
}
Your code will close when start send data (send and stop)
You should wait it done.
Add code after writer.flush();
Example get response:
BufferedReader in = new BufferedReader(
new InputStreamReader(urlConnection.getInputStream()));
String inputLine;
StringBuilder response = new StringBuilder();
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
or just get responseCode:
int responseCode = urlConnection.getResponseCode();
Your program wait send request success or fail.
I think you use Thread.sleep(100); to wait send request, but it stop your Thread (don't send data to server)
Your code have req.body, Express.js don't have it, need use middleware body-parser.
I'm trying to get my user information from stackoverflow api using a simple HTTP request with GET method in Java.
This code I had used before to get another HTTP data using GET method without problems:
URL obj;
StringBuffer response = new StringBuffer();
String url = "http://api.stackexchange.com/2.2/users?inname=HCarrasko&site=stackoverflow";
try {
obj = new URL(url);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
con.setRequestMethod("GET");
int responseCode = con.getResponseCode();
System.out.println("\nSending 'GET' request to URL : " + url);
System.out.println("Response Code : " + responseCode);
BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
String inputLine;
while ((inputLine = in.readLine()) != null) {
response.append(inputLine);
}
in.close();
System.out.println(response.toString());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
But in this case I'm getting just stranger symbols when I print the response var, like this:
�mRM��0�+�N!���FZq� \�pD�z�:V���JX���M��̛yO^���뾽�g�5J&� �9� YW�%c`do ���Y'��nKC38<A�&It�3��6a�,�,]���`/{�D����>6�Ɠ��{��7tF ��E� �/����K���#_&�yI�a�v��uw}/�g�5����TkBTķ���U݊c���Q�y$���$�=ۈ��ñ���8f�<*�Amw�W�ـŻ��X$� >'*QN�?�<v�ݠ FH*��Ҏ5����ؔA�z��R��vK���"���#�1��ƭ5��0��R���z�ϗ/�������^?r��&�f��-�OO7���������Gy�B���Rxu�#:0�xͺ}�\�����
thanks in advance.
The content is likely GZIP encoded/compressed. The following is a general snippet that I use in all of my Java-based client applications that utilize HTTP, which is intended to deal with this exact problem:
// Read in the response
// Set up an initial input stream:
InputStream inputStream = fetchAddr.getInputStream(); // fetchAddr is the HttpURLConnection
// Check if inputStream is GZipped
if("gzip".equalsIgnoreCase(fetchAddr.getContentEncoding())){
// Format is GZIP
// Replace inputSteam with a GZIP wrapped stream
inputStream = new GZIPInputStream(inputStream);
}else if("deflate".equalsIgnoreCase(fetchAddr.getContentEncoding())){
inputStream = new InflaterInputStream(inputStream, new Inflater(true));
} // Else, we assume it to just be plain text
BufferedReader sr = new BufferedReader(new InputStreamReader(inputStream));
String inputLine;
StringBuilder response = new StringBuilder();
// ... and from here forward just read the response...
This relies on the following imports: java.util.zip.GZIPInputStream; java.util.zip.Inflater; and java.util.zip.InflaterInputStream.
I am tiring to execute some of my project URLs through JAVA APIs. But some of them contain JSON values. Its not accepting the JSON I am providing.
If I hit same URL through browser it executes. I am not getting what is going wrong. Are the " " specified not accepted ?
URL = http://admin.biin.net:8289/project.do?cmd=AddProject&mode=default&projectFieldValueJSON={"fieldIds":[{"id":1360,"value":"project SS33"},{"id":1362,"value":"12/03/2015"},{"id":1363,"value":"12/31/2015"}],"state":1}&jsessionid=AE5B03C9791D1019DCD7BBF0E34CCFEE
The Code is as follows
String requestString = "http://admin.biin.net:8289 /project.do?cmd=AddProject&mode=default&projectJSON={"fieldIds":[{"id":1360,"value":"project SS33"},{"id":1362,"value":"12/03/2015"},{"id":1363,"value":"12/31/2015"}],"state":1}&jsessionid=AE5B03C9791D1019DCD7BBF0E34CCFEE"
URL url = new URL(requestString);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST");
conn.setDoOutput(true);
conn.connect();
InputStream in = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
StringBuffer responseString = new StringBuffer();
String line = null;
while ((line = reader.readLine()) != null) {
responseString.append(line);
}
Error :
java.io.IOException: Server returned HTTP response code: 505 for URL: http://admin.biin.net:8289/project.do?cmd=AddProject&mode=default&projectJSON={"fieldIds":[{"id":1360,"value":"project SS33"},{"id":1362,"value":"12/03/2015"},{"id":1363,"value":"12/31/2015"}],"state":1}&jsessionid=AE5B03C9791D1019DCD7BBF0E34CCFEE
If I remove the JSON the URL executes.
Don't pass json in QueryString. Since you are using HTTP POST. You should send the sensitive data in the HTTP body. Like this
String str = "some string goes here";
byte[] outputInBytes = str.getBytes("UTF-8");
OutputStream os = conn.getOutputStream();
os.write( outputInBytes );
os.close();
For your current problem. Encode the json value before passing it in url.
Try this:
try {
String s = "http://admin.biin.net:8289/project.do?cmd=AddProject&mode=default&projectFieldValueJSON="
+ URLEncoder.encode("{\"fieldIds\":[{\"id\":1360,\"value\":\"project SS33\"},{\"id\":1362,\"value\":\"12/03/2015\"},{\"id\":1363,\"value\":\"12/31/2015\"}],\"state\":1}", "UTF-8")
+ "&jsessionid=AE5B03C9791D1019DCD7BBF0E34CCFEE";
System.out.println(s);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
Result: http://admin.biin.net:8289/project.do?cmd=AddProject&mode=default&projectFieldValueJSON=%7B%22fieldIds%22%3A%5B%7B%22id%22%3A1360%2C%22value%22%3A%22project+SS33%22%7D%2C%7B%22id%22%3A1362%2C%22value%22%3A%2212%2F03%2F2015%22%7D%2C%7B%22id%22%3A1363%2C%22value%22%3A%2212%2F31%2F2015%22%7D%5D%2C%22state%22%3A1%7D&jsessionid=AE5B03C9791D1019DCD7BBF0E34CCFEE
In official documentation of Google Translate Api for Java it says that we can use post-method to send more than 2K characters. https://developers.google.com/translate/v2/using_rest
However when I try to translate text more than 2k length I get error 414 (Request-URI Too Large).
StringBuilder sb = new StringBuilder();
HttpURLConnection connection = null;
try {
URL url = new URL("https://www.googleapis.com/language/translate/v2");
String urlParameters = "key=" + apiKey + "&source=" + shortLang1 +
"&target=" + shortLang2 + "&q=" + URLEncoder.encode(lyrics, "UTF-8");
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setUseCaches (false);
connection.addRequestProperty("X-HTTP-Method-Override", "GET");
DataOutputStream wr = new DataOutputStream (connection.getOutputStream ());
wr.writeBytes (urlParameters);
wr.flush ();
wr.close ();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
if (connection.getResponseCode() != 200) {
return null;
}
String line;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
reader.close();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (connection != null) {
connection.disconnect();
}
}
UPDATE: I got it, the code above is right. Finally I realize that I got this error not from Google Translate service but from my proxy on Google App Engine.
What the document you linked to is saying is that you use the POST method and you put the parameters into the request body ... not the request URL.
Reference:
How are parameters sent in an HTTP POST request?
I am actually using the community plugin in Neo4j and trying to make POST requests through java to query neo4j server.
I am always getting a java.io.IOException: Server returned HTTP response code: 400
While similar calls to the same url work through javascript, but the business logic suggests making calls through java.
Here is my code snippet:
String baseURL="ip_of_server";
StringBuilder builder = new StringBuilder();
try {
URL url = new URL(baseURL);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoOutput(true);
connection.setDoInput(true);
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "application/json");
OutputStream os=connection.getOutputStream();
OutputStreamWriter writer = new OutputStreamWriter(os,Charset.forName("UTF-8"));
System.out.println(url);
Map<String, Object> params = new HashMap<String, Object>();
params.put("query", "start x = node(3) return x");
HashMap<String,String> test3= new HashMap<String,String>();
params.put("params", test3);
ObjectMapper temp = new ObjectMapper();
String testString= temp.writeValueAsString(params);
writer.write(testString);
writer.close();
os.close();
String line = null;
BufferedReader reader = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
while ((line = reader.readLine()) != null) {
builder.append(line);
}
System.out.println("Response from server for request : " + url.toString() + " is " );
System.out.println(builder.toString());
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
Any suggestions?
What it requires is a parser, since '=' etc are converted by the encoding into other characters, hence neo4j throws an error