Unknown. Host. Exception thrown from commons httpclient 3. Stack Overflow. I need to use commons httpclient 3. I am trying to do a simple http GET from url http www. Below is my sample code. Apache Commons Httpclient Jar CONSIDER import this class and risk more Jar File Hell. Hi Analyzing a project where ESAPI is used I found out that has antisamy as dependency, and that this project has commonshttpclient3. IOException. import org. Default. Http. Method. Retry. Handler. import org. The HttpClient component supports the clientside of RFC 1945 HTTP1. RFC 2616 HTTP1. 1, several related specifications RFC 2109 Co. Migrating from HttpClient 3. Replace commonshttpclient3. History. HttpClient was started in 2001 as a subproject of the Jakarta Commons, based on code developed by the Jakarta Slide project. Download JAR files for commonshttpclient3. Lets talk about commonshttpclient3. I get asked about this library all the time. Its an HTTP communication library. It has a vulnerability in it. Http. Client. import org. Http. Exception. import org. Http. Status. import org. Username. Password. Credentials. import org. Auth. Scope. import org. Get. Method. import org. Http. Method. Params. Http. Client. Tutorial. String url http www. String args. Create an instance of Http. Client. Http. Client client new Http. Client. Create a method instance. Get. Method method new Get. Methodurl. Provide custom retry handler is necessary. Apache Commons Jar' title='Apache Commons Jar' />HttpclientParams. ParameterHttp. Method. Params. RETRYHANDLER. Default. Http. Method. Retry. Handler3, false. Params. set. Authentication. Preemptivetrue. State. Proxy. Credentials. Auth. Scope1. 0. 1. Username. Password. Credentials,. Execute the method. Code client. execute. Methodmethod. if status. Code Http. Status. SCOK. System. Method failed method. Status. Line. Read the response body. Body method. get. Response. Body. Deal with the response. Use caution ensure correct character encoding and is not binary. System. out. printlnnew Stringresponse. Body. catch Http. Exception e. System. Fatal protocol violation e. Message. e. print. Stack. Trace. catch IOException e. System. err. printlnFatal transport error e. Message. e. print. Stack. Trace. finally. Release the connection. Connection. However when I run the code I get exception thrown which is 1. Http. Method. Director authenticate. Host. WARNING Required credentials not available for BASIC lt any realm www. Http. Method. Director authenticate. Host. WARNING Preemptive authentication requested but no default credentials available. Fatal transport error www. Unknown. Host. Exception www. Plain. Socket. Impl. Unknown Source. at java. Socks. Socket. Impl. Unknown Source. at java. Socket. connectUnknown Source. Socket. connectUnknown Source. Socket. lt init Unknown Source. Socket. lt init Unknown Source. Default. Protocol. Socket. Factory. create. SocketDefault. Protocol. Socket. Factory. java 8. Default. Protocol. Socket. Factory. create. SocketDefault. Protocol. Socket. Factory. java 1. Http. Connection. Http. Connection. Http. Method. Director. With. RetryHttp. Method. Director. Http. Method. Director. MethodHttp. Method. Director. Http. Client. execute. MethodHttp. Client. Http. Client. execute. MethodHttp. Client. Http. Client. Tutorial. Http. Client. Tutorial. Could someone tell me what I did wrong as I am new to this Http. Client library however I need to use it as I have no intention to use Http. Components library Now I have found a solution to this problem. Please refer to the code below. IOException. import org. Credentials. import org. Default. Http. Method. Retry. Handler. import org. Http. Client. import org. Http. Exception. import org. Http. Status. import org. Username. Password. Credentials. import org. Auth. Scope. import org. Get. Method. import org. Http. Method. Params. Http. Client. Tutorial. String url http www. String args. Create an instance of Http. Client. Http. Client client new Http. Client. Create a method instance. Get. Method method new Get. Methodurl. Provide custom retry handler is necessary. Params. set. ParameterHttp. Method. Params. RETRYHANDLER. Default. Http. Method. Retry. Handler3, false. Host. Configuration. Proxy1. 0. 1. 00. Execute the method. Code client. execute. Methodmethod. if status. Code Http. Status. SCOK. System. Method failed method. Status. Line. Read the response body. Body method. get. Response. Body. Deal with the response. Use caution ensure correct character encoding and is not binary. System. out. printlnnew Stringresponse. Body. catch Http. Exception e. System. Fatal protocol violation e. Message. e. print. Stack. Trace. catch IOException e. System. err. printlnFatal transport error e. Message. e. print. Stack. Trace. finally. Release the connection. Well due to some vulnerability we need to move from commons httpclient 3. Now have a code base which was working before on 3. Do you have any idea or came across on how to overcome these errors. Error I get is. 1 The import org. Host. Configuration cannot be resolved. The method get. State is undefined for the type Http. Client. Here is the source code. Let me know if you have any information. Message. Context. Transport. Client. Properties. import org. Transport. Client. Properties. Factory. Credentials. import org. Host. Configuration. Http. Client. import org. NTCredentials. import org. Username. Password. Daz3d Poser Content. Credentials. import org. Auth. Scope. import java. URL. public class Commons. HTTPSender extends. Commons. HTTPSender. String PROPERTYPROXYHOST https. Host. public static final String PROPERTYPROXYPORT https. Port. public static final String PROPERTYPROXYUSERNAME https. User. public static final String PROPERTYPROXYPASSWORD https. Password. public Commons. HTTPSender. protected Host. Configuration get. Host. ConfigurationHttp. Client client. Message. Context context, URL target. URL. Host. Configuration config new Host. Configuration. if target. URL. get. Protocol. Ignore. Casehttps. Jli our changes start from here. There is a defect in the Default. HTTPSTransport. Client. Properties. The class is only called once to get the proxy setttings from the system properties. If users. Change the proxy settings, the class will not pick up the changes. On our DMDI GUI, users. This will create an issue that when the apache axis. GUI the first time. We only use the HTTPS, so this change is only valid for the https. Port target. URL. Port. if url. Port 1. Port 4. 43 default port for https being 4. String proxy. Host StringSystem. PropertyPROPERTYPROXYHOST. String proxy. Port StringSystem. PropertyPROPERTYPROXYPORT. String proxy. Username StringSystem. PropertyPROPERTYPROXYUSERNAME. String proxy. Password StringSystem. PropertyPROPERTYPROXYPASSWORD. Host null proxy. Port null. Host. length 0 proxy. Port. length 0. Hosttarget. URL. Host, url. Port, target. URL. get. Protocol. Username null proxy. Password null proxy. Username. length 0. Credentials proxy. Cred new Username. Password. Credentialsproxy. Username. proxy. Password. NTCredentials instead. Index proxy. Username. Of. if domain. Index 0. String domain proxy. Descargar Musica De Ulises Bueno Historias Cantadas 2'>Descargar Musica De Ulises Bueno Historias Cantadas 2. Username. substring0. Index. if proxy. Username. Index 1. String user proxy. Username. substring. Index 1. proxy. Cred new NTCredentialsuser, proxy. Password, proxy. Host. State. set. Proxy. CredentialsAuth. Scope. ANY. proxy. Cred. Port. Int new Integerproxy. Port. int. Value. Proxyproxy. Host, proxy. Port. Int. config super. Host. Configurationclient, context, target. URL. return config.