Hessian 1.0.5-RC2 常见问题

公司因业务需求准备开放一些API接口让代理商使用，周末抽了些时间了解了一下这方面的技术后，决定采用caucho.com的Hessian实现（hessian使用方便又高效）

测试环境

    Window XP
    JDK 1.6
    Resin3.1.9
    Spring2.0.8
    hessian-3.0.20.jar（这个版本要与spring的对应，不要一味的追求最新版，我因为这个，不知是好还是坏的毛病吃了N多苦头）
    HessianPHP-1.0.5-RC2
    Apache2.2
    PHP5.3.0


刚开始跑Java服务器端和客服端的测试都很顺利，但是当使用php5.3做为客户端访问Java时出现了好几个问题
Php代码

    include_once   '../dist/Hessian.php' ;  
    include_once   '../dist/HessianClient.php' ;  
      
    Hessian :: mapRemoteType('com.hisupplier.showroom.webservice.QueryParams' ,  'QueryParams' );  
    Hessian :: mapRemoteType('com.hisupplier.showroom.webservice.ListResult' ,  'ListResult' );  
    Hessian :: mapRemoteType('com.hisupplier.showroom.entity.Product' ,  'Product' );  
    Hessian :: mapRemoteType('com.hisupplier.commons.page.Page' ,  'Page' );  
      
    try {  
        $params  =  new  QueryParams(114);  
      
        $url  =  "http://guiyou.jiaming.com/webService" ;  
        $proxy  =  new  HessianClient( $url );  
        echo   "<br>" ;  
        print_r($proxy ->hello( $params ));  
        echo   "<br>" ;  
        print_r($proxy ->getProduct( $params ));   
        echo   "<br>" ;  
        print_r($proxy ->getList( $params ));  //要命的问题出在这里   
    } catch (HttpError $ex ) {  
        ...  
    }  

Java代码

    public   interface  ShowroomAPI {  
        String hello(QueryParams params);  
        ListResult<Product> getList(QueryParams params);  
        Product getProduct(QueryParams params);  
    }  


第1个问题
因为php5.2.x版本后自带了DateTime类，和 HessianPHP 中的发生冲突
解决： 改文件DateTime.php 为 HessianDateTime.php，类DateTime 为 HessianDateTime

第2个问题
PHP Warning: date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'UTC' for '8.0/no DST' instead in G://php//HessianPHP//dist//Hessian.php on line 74
解决： 将date() 方法都改为 date_default_timezone_set()

第3个问题
Php代码

    Exception: Hessian Parser, Malformed reply: expected r Code: 2 exception  'HessianError'  with message  'Hessian Parser, Malformed reply: expected r'  in E:/workspace/php-test/dist/Protocol.php:339 Stack trace:   
    #0 E:/workspace/php-test/dist/HessianClient.php(215): HessianParser->parseReply()   
    #1 E:/workspace/php-test/dist/Filter.php(159): HessianProxy->executeCall('getList' , Array)   
    #2 E:/workspace/php-test/dist/Filter.php(73): ProxyFilter->execute(Object(HessianProxy), Object(FilterChain))   
    #3 E:/workspace/php-test/dist/Filter.php(191): FilterChain->doFilter(Object(HessianProxy))   
    #4 E:/workspace/php-test/dist/Filter.php(73): PHPErrorReportingFilter->execute(Object(HessianProxy), Object(FilterChain))   
    #5 E:/workspace/php-test/dist/HessianClient.php(182): FilterChain->doFilter(Object(HessianProxy))   
    #6 E:/workspace/php-test/dist/HessianClient5.php(94): HessianProxy->call('getList' , Array)   
    #7 [internal function ]: HessianClient->__call( 'getList' , Array)   
    #8 E:/workspace/php-test/tests/test.php(23): HessianClient->getList(Object(QueryParams))   
    #9 {main}  


google, baidu了半天也没找到相关的文章，后来把apache和php分别降到2.0和5.1还是不行，最后快放弃了试了一下yahoo，哦！my god佛祖保佑阿门，让我找了一了篇文章
引用

Chunked http responses cause a protocol parse error

Http.php is written to perform an HTTP POST using HTTP/1.1 which means that
the Hessian client must support a HTTP header of "Transfer-Encoding:
chunked".

Protocol::parseReply() is written as follows:

if($this->read(1) != 'r') {
return new HessianError('Hessian Parser, Malformed reply: expected
r',HESSIAN_PARSER_ERROR,0,$this->stream);
}

which will fail because the first line of a chunked response will contain
the chunk length. Protocol::parseReply() needs to be written to support
chunking.

At the moment the workaround I have is to set HTTP/1.0 in Http::POST.


解决： 把Http.php中的1.1改为1.0
在Http.php第200行： $out = "POST $this->url HTTP/1.1/r/n";

 

第4个问题，由于BOM头引起，在调用过程中包含的文件有BOM，BOM在调用中先输出，引起Hessian失败，对于是UTF8编辑的文件，仔细检查包含文件中是否有BOM头的文件。下面有一段去BOM头的PHP代码，把这段代码保存在WEB文件目录下。直接执行可以查看是否有BOM头的文件，把$auto = 1; 则会自动删除BOM头。

<?php if (isset($_GET['dir'])){ //设置文件目录 $basedir=$_GET['dir']; }else{ $basedir = '.'; } $auto = 0; checkdir($basedir); function checkdir($basedir){ if ($dh = opendir($basedir)) { while (($file = readdir($dh)) !== false) { if ($file != '.' && $file != '..' && $file != '.svn'){ if (!is_dir($basedir."/".$file)) { echo "filename: $basedir/$file ".checkBOM("$basedir/$file").PHP_EOL; }else{ $dirname = $basedir."/".$file; checkdir($dirname); } } } closedir($dh); } } function checkBOM ($filename) { global $auto; $contents = file_get_contents($filename); $charset[1] = substr($contents, 0, 1); $charset[2] = substr($contents, 1, 1); $charset[3] = substr($contents, 2, 1); if (ord($charset[1]) == 239 && ord($charset[2]) == 187 && ord($charset[3]) == 191) { if ($auto == 1) { $rest = substr($contents, 3); rewrite ($filename, $rest); return ("<font color=red>BOM found, automatically removed.</font><br />"); } else { return ("<font color=red>BOM found.</font><br />"); } } else return ("BOM Not Found.<br />"); } function rewrite ($filename, $data) { $filenum = fopen($filename, "w"); flock($filenum, LOCK_EX); fwrite($filenum, $data); fclose($filenum); } ?> 

 

 

目前最新版本是HessianPHP_v2.0.3， 如果PHP版本是5.3以上最好选择HessianPHP_v2.0.3版本。

下载地址：http://nchc.dl.sourceforge.net/project/hessianphp/HessianPHP/HessianPHP%202/HessianPHP_v2.0.3.zip

使用教程：http://hessianphp.sourceforge.net/index.php?n=Main.QuickStart