Examples of org.apache.http.ProtocolException

org.apache.http.ProtocolException
Signals that an HTTP protocol violation has occurred. For example a malformed status line or headers, a missing message body, etc. @author Laura Werner @since 4.0

        int minor;
        if (s == null) {
            throw new IllegalArgumentException("String may not be null");
        }
        if (!s.startsWith("HTTP/")) {
            throw new ProtocolException("Invalid HTTP version string: " + s);
        }
        int i1 = "HTTP/".length();
        int i2 = s.indexOf(".", i1);
        if (i2 == -1) {
            throw new ProtocolException("Invalid HTTP version number: " + s);
        }
        try {
            major = Integer.parseInt(s.substring(i1, i2));
        } catch (NumberFormatException e) {
            throw new ProtocolException("Invalid HTTP major version number: " + s);
        }
        i1 = i2 + 1;
        i2 = s.length();
        try {
            minor = Integer.parseInt(s.substring(i1, i2));
        } catch (NumberFormatException e) {
            throw new ProtocolException("Invalid HTTP minor version number: " + s);
        }
        return new HttpVersion(major, minor);
    }

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        }
        //get the location header to find out where to redirect to
        Header locationHeader = response.getFirstHeader("location");
        if (locationHeader == null) {
            // got a redirect response, but no location header
            throw new ProtocolException(
                    "Received redirect response " + response.getStatusLine()
                    + " but no location header");
        }
        String location = locationHeader.getValue();
        if (this.log.isDebugEnabled()) {
            this.log.debug("Redirect requested to location '" + location + "'");
        }


        URI uri = createLocationURI(location);


        HttpParams params = request.getParams();
        // rfc2616 demands the location value be a complete URI
        // Location       = "Location" ":" absoluteURI
        try {
            // Drop fragment
            uri = URIUtils.rewriteURI(uri);
            if (!uri.isAbsolute()) {
                if (params.isParameterTrue(ClientPNames.REJECT_RELATIVE_REDIRECT)) {
                    throw new ProtocolException("Relative redirect location '"
                            + uri + "' not allowed");
                }
                // Adjust location URI
                HttpHost target = (HttpHost) context.getAttribute(ExecutionContext.HTTP_TARGET_HOST);
                if (target == null) {
                    throw new IllegalStateException("Target host not available " +
                            "in the HTTP context");
                }
                URI requestURI = new URI(request.getRequestLine().getUri());
                URI absoluteRequestURI = URIUtils.rewriteURI(requestURI, target, true);
                uri = URIUtils.resolve(absoluteRequestURI, uri);
            }
        } catch (URISyntaxException ex) {
            throw new ProtocolException(ex.getMessage(), ex);
        }


        RedirectLocations redirectLocations = (RedirectLocations) context.getAttribute(
                REDIRECT_LOCATIONS);
        if (redirectLocations == null) {

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     */
    protected URI createLocationURI(final String location) throws ProtocolException {
        try {
            return new URI(location);
        } catch (URISyntaxException ex) {
            throw new ProtocolException("Invalid redirect URI: " + location, ex);
        }
    }

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                    uri = URIUtils.rewriteURI(uri);
                }
            }


        } catch (URISyntaxException ex) {
            throw new ProtocolException("Invalid URI: " +
                    request.getRequestLine().getUri(), ex);
        }
    }

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            HttpRequest orig = request.getOriginal();
            redirect.setHeaders(orig.getAllHeaders());


            URI uri = redirect.getURI();
            if (uri.getHost() == null) {
                throw new ProtocolException("Redirect URI does not specify a valid host name: " + uri);
            }


            HttpHost newTarget = new HttpHost(
                    uri.getHost(),
                    uri.getPort(),

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            for (int i = 0; i < this.headerBufs.size(); i++) {
                CharArrayBuffer buffer = (CharArrayBuffer) this.headerBufs.get(i);
                try {
                    this.message.addHeader(new BufferedHeader(buffer));
                } catch (IllegalArgumentException ex) {
                    throw new ProtocolException(ex.getMessage());
                }
            }
            return this.message;
        } else {
            return null;

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        if (request == null) {
            throw new IllegalArgumentException("HTTP request may not be null");
        }
        if (request instanceof HttpEntityEnclosingRequest) {
            if (request.containsHeader(HTTP.TRANSFER_ENCODING)) {
                throw new ProtocolException("Transfer-encoding header already present");
            }
            if (request.containsHeader(HTTP.CONTENT_LEN)) {
                throw new ProtocolException("Content-Length header already present");
            }
            HttpVersion ver = request.getRequestLine().getHttpVersion();
            HttpEntity entity = ((HttpEntityEnclosingRequest)request).getEntity();
            if (entity == null) {
                request.addHeader(HTTP.CONTENT_LEN, "0");
                return;
            }
            // Must specify a transfer encoding or a content length 
            if (entity.isChunked() || entity.getContentLength() < 0) {
                if (ver.lessEquals(HttpVersion.HTTP_1_0)) {
                    throw new ProtocolException(
                            "Chunked transfer encoding not allowed for " + ver);
                }
                request.addHeader(HTTP.TRANSFER_ENCODING, HTTP.CHUNK_CODING);
            } else {
                request.addHeader(HTTP.CONTENT_LEN, Long.toString(entity.getContentLength()));

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                for (int i = 0; i < encodings.length; i++) {
                    String encoding = encodings[i].getName();
                    if (encoding != null && encoding.length() > 0 
                        && !encoding.equalsIgnoreCase(HTTP.CHUNK_CODING)
                        && !encoding.equalsIgnoreCase(HTTP.IDENTITY_CODING)) {
                        throw new ProtocolException("Unsupported transfer encoding: " + encoding);
                    }
                }
            }
            // The chunked encoding must be the last one applied RFC2616, 14.41
            int len = encodings.length;
            if (HTTP.IDENTITY_CODING.equalsIgnoreCase(transferEncodingHeader.getValue())) {
                return IDENTITY;                            
            } else if ((len > 0) && (HTTP.CHUNK_CODING.equalsIgnoreCase(
                    encodings[len - 1].getName()))) { 
                return CHUNKED;
            } else {
                if (strict) {
                    throw new ProtocolException("Chunk-encoding must be the last one applied");
                }
                return IDENTITY;                            
            }
        } else if (contentLengthHeader != null) {
            long contentlen = -1;
            Header[] headers = message.getHeaders(HTTP.CONTENT_LEN);
            if (strict && headers.length > 1) {
                throw new ProtocolException("Multiple content length headers");
            }
            for (int i = headers.length - 1; i >= 0; i--) {
                Header header = headers[i];
                try {
                    contentlen = Long.parseLong(header.getValue());
                    break;
                } catch (NumberFormatException e) {
                    if (strict) {
                        throw new ProtocolException("Invalid content length: " + header.getValue());
                    }
                }
                // See if we can have better luck with another header, if present
            }
            if (contentlen >= 0) {

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        Header contentLengthHeader = message.getFirstHeader(HTTP.CONTENT_LEN);
        if (transferEncodingHeader != null) {
            String s = transferEncodingHeader.getValue();
            if (HTTP.CHUNK_CODING.equalsIgnoreCase(s)) {
                if (message.getHttpVersion().lessEquals(HttpVersion.HTTP_1_0)) {
                    throw new ProtocolException(
                            "Chunked transfer encoding not allowed for " + 
                            message.getHttpVersion());
                }
                return CHUNKED;
            } else if (HTTP.IDENTITY_CODING.equalsIgnoreCase(s)) {
                return IDENTITY;
            } else {
                throw new ProtocolException(
                        "Unsupported transfer encoding: " + s);
            }
        } else if (contentLengthHeader != null) {
            String s = contentLengthHeader.getValue();
            try {
                long len = Long.parseLong(s);
                return len;
            } catch (NumberFormatException e) {
                throw new ProtocolException("Invalid content length: " + s);
            }
        } else {
            return IDENTITY; 
        }
    }

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            if (buffer.charAt(i    ) != 'H' 
             || buffer.charAt(i + 1) != 'T'
             || buffer.charAt(i + 2) != 'T'
             || buffer.charAt(i + 3) != 'P'
             || buffer.charAt(i + 4) != '/') {
                throw new ProtocolException("Not a valid HTTP version string: " + 
                        buffer.substring(indexFrom, indexTo));
            }
            i += 5;
            int period = buffer.indexOf('.', i, indexTo);
            if (period == -1) {
                throw new ProtocolException("Invalid HTTP version number: " + 
                        buffer.substring(indexFrom, indexTo));
            }
            try {
                major = Integer.parseInt(buffer.substringTrimmed(i, period)); 
            } catch (NumberFormatException e) {
                throw new ProtocolException("Invalid HTTP major version number: " + 
                        buffer.substring(indexFrom, indexTo));
            }
            try {
                minor = Integer.parseInt(buffer.substringTrimmed(period + 1, indexTo)); 
            } catch (NumberFormatException e) {
                throw new ProtocolException("Invalid HTTP minor version number: " + 
                        buffer.substring(indexFrom, indexTo));
            }
            return new HttpVersion(major, minor);
            
        } catch (IndexOutOfBoundsException e) {
            throw new ProtocolException("Invalid HTTP version string: " + 
                    buffer.substring(indexFrom, indexTo)); 
        }
    }

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