从Java重新创建PDF文件到PHP [英] Recreate PDF File From Java To PHP

问题描述

我有一个Java的WebService（使用Apache Axis）获取文档的id并调用JasperReports创建一个PDF文件（以前在java app - server side中创建的报告）来创建报告我是使用方法：JasperManager.fillReport和JasperExportManager.exportReportToPdf。最后一个返回一个字节数组。我的webservice获取数组并将其编码为Base64字符串，PHP接收此字符串作为WebService的响应。

I have a WebService in Java (Using Apache Axis) that get's the id of a document and this call to JasperReports to create a PDF File (Report previously created in java app - server side), to create the report i'm using the methods: JasperManager.fillReport and JasperExportManager.exportReportToPdf. The last one returns an array of bytes. My webservice takes the array and encodes it into a Base64 String, PHP receives this string as response from the WebService.

我想用PHP重新创建文件，但我不知道我不知道这是否可行。我正在尝试使用以下代码段执行此操作：

I want to recreate the file in PHP, but i don't know exactly if this is possible. I'm trying to do this with the following snippet:

private function createFileFromString($stringWithFile){
    header('Content-Description: File Transfer');
    header("Content-Type: application/pdf");
    header('Content-Disposition: attachment; filename=remesa.pdf');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    ob_start();
    ob_clean();
    ob_flush();
    flush();
    $fp = file_put_contents("document.pdf", "w");
    fwrite($fp, base64_decode($stringWithFile));
    readfile($fp);
    ob_get_contents();
    fclose($fp);
    exit();
}

WebService返回一个字符串，如下所示：

The WebService Returns a String Like this:

JVBERi0xLjQKJeLjz9MKNCAwIG9iaiA8PC9UeXBlL1hPYmplY3QvQ29sb3JTcGFjZS9EZXZpY2VS
R0IvU3VidHlwZS9JbWFnZS9CaXRzUGVyQ29tcG9uZW50IDgvV2lkdGggMjg0L0xlbmd0aCAzNjc0
L0hlaWdodCA1MC9GaWx0ZXIvRENURGVjb2RlPj5zdHJlYW0K / 9J / 4AAQSkZJRgABAgAAAQABAAD /
2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0aHBwgJC4nICIsIxwcKDcpLDAxNDQ0
Hyc5PTgyPC4zNDL / 2wBDAQkJCQwLDBgNDRgyIRwhMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIy
MjIyMjIyMjIyMjIyMjIyMjIyMjIyMjL / wAARCAAyARwDASIAAhEBAxEB / 8QAHwAAAQUBAQEBAQEA ...

JVBERi0xLjQKJeLjz9MKNCAwIG9iaiA8PC9UeXBlL1hPYmplY3QvQ29sb3JTcGFjZS9EZXZpY2VS R0IvU3VidHlwZS9JbWFnZS9CaXRzUGVyQ29tcG9uZW50IDgvV2lkdGggMjg0L0xlbmd0aCAzNjc0 L0hlaWdodCA1MC9GaWx0ZXIvRENURGVjb2RlPj5zdHJlYW0K/9j/4AAQSkZJRgABAgAAAQABAAD/ 2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0aHBwgJC4nICIsIxwcKDcpLDAxNDQ0 Hyc5PTgyPC4zNDL/2wBDAQkJCQwLDBgNDRgyIRwhMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIy MjIyMjIyMjIyMjIyMjIyMjIyMjIyMjL/wAARCAAyARwDASIAAhEBAxEB/8QAHwAAAQUBAQEBAQEA...

此字符串包含PDF标题，如下所示：

This string has the "PDF Header", begins like this:

％PDF-1.4％ãÏÓ40 obj
<> streamÿØÿà

%PDF-1.4 %âãÏÓ 4 0 obj <>stream ÿØÿà

当我尝试下载文件时，它的大小约为4-5KB（并且文件已损坏），但响应字符串大约为180KB。

When i try to download the file, it's size is around 4-5KB (and, the file is damaged), but the Response String is around 180KB.

这是pos锡布尔赫丁？我做错了什么？

Is this possible? What i'm doing wrong?

编辑：我读过关于解包功能，也许这个功能可以帮到我吗？

I've read about unpack function, maybe this function can help me?

提前致谢

推荐答案

好的，我解决了。我基本上有两个错误：

Ok, i solved it. I have, basically, two errors:

1。来自Java：我用来编码PDF文件内容（ org.w3c.tools.codec.Base64Encoder ）的类正在破坏字符串文件内容，而不是这个类，我已切换到Apache Axis工具（ org.apache.axis.encoding.Base64 ）。我这样说是因为我比较了用我的Java App生成的PDF的内容和从WebService返回的内容，而最后一个的内容有点小。

1. From Java: The class that i've used to encode the content of PDF file (org.w3c.tools.codec.Base64Encoder) was corrupting the String with the file content, instead of this class, i've switched to Apache Axis Tools (org.apache.axis.encoding.Base64). I say this because i've compared the content of a PDF generated with my Java App and the content returned from the WebService and the last one is a bit smaller.

<强> 2。从PHP：构建文件：在这部分我试图这样做：

2. From PHP: Building The File: In this part i've trying to do this:

$fp = file_put_contents("document.pdf", "w");
fwrite($fp, base64_decode($stringWithFile));
readfile($fp);

但是，只有使用file_put_contents我已经将内容写入PDF文件，fwrite it wasn'在这一点上必然。我正在使用此代码段生成pdf：

But, only with file_put_contents i've done writing the content to a PDF File, fwrite it wasn't necessarily at this point. I'm generating the pdf with this snippet:

private function createFileFromString($stringWithFile){
    header('Content-Description: File Transfer');
    header("Content-Type: application/pdf");
    header('Content-Disposition: attachment; filename=document.pdf');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    flush();
    file_put_contents("document.pdf", base64_decode($stringWithFile));
    readfile("document.pdf");
    exit();
}

我希望这个答案对每个人都有帮助。

I hope that this answer helps to everyone.

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