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httpclient3.1中的两个关键方法

    博客分类:
  • java
 
阅读更多
在HttpMethodBase类中,关键方法1:
 public int execute(HttpState state, HttpConnection conn)
        throws HttpException, IOException {
                
        LOG.trace("enter HttpMethodBase.execute(HttpState, HttpConnection)");

        // this is our connection now, assign it to a local variable so 
        // that it can be released later
        this.responseConnection = conn;

        checkExecuteConditions(state, conn);
        this.statusLine = null;
        this.connectionCloseForced = false;

        conn.setLastResponseInputStream(null);

        // determine the effective protocol version
        if (this.effectiveVersion == null) {
            this.effectiveVersion = this.params.getVersion(); 
        }

        writeRequest(state, conn);
        this.requestSent = true;
        readResponse(state, conn);
        // the method has successfully executed
        used = true; 

        return statusLine.getStatusCode();
    }
关键方法2:
 protected void readResponse(HttpState state, HttpConnection conn)
    throws IOException, HttpException {
        LOG.trace(
        "enter HttpMethodBase.readResponse(HttpState, HttpConnection)");
        // Status line & line may have already been received
        // if 'expect - continue' handshake has been used
        while (this.statusLine == null) {
            readStatusLine(state, conn);
            processStatusLine(state, conn);
            readResponseHeaders(state, conn);
            processResponseHeaders(state, conn);
            
            int status = this.statusLine.getStatusCode();
            if ((status >= 100) && (status < 200)) {
                if (LOG.isInfoEnabled()) {
                    LOG.info("Discarding unexpected response: " + this.statusLine.toString()); 
                }
                this.statusLine = null;
            }
        }
        readResponseBody(state, conn);
        processResponseBody(state, conn);//此方法为空,可以被子类覆写
    }

 看代码,http头是被httpclient直接处理的,但是body就没有处理了,直接保留了stream没有去读。

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