在Postgres中存储Zip文件 [英] Storing Zip file in Postgres

问题描述

我一直在将zip文件的内容存储在MySQL数据库的LONGBLOB中，但是我正在迁移到Postgres.根据我的阅读，Postgres中的LONGBLOB相当于bytea.不幸的是，我无法将zip内容写入数据库.首先，我收到此错误:

 警告:pg_query():查询失败:错误:编码"UTF8"的字节序列无效0x5c 

然后我用SQL_ASCII编码创建了一个新数据库(以前的数据库为UTF8)，并出现以下错误:

  PHP警告:pg_query():查询失败:错误:v╘▓ú5"或附近的语法错误第2行:...√╢V[úB√▬┌»å⌐²└ù╙±b±≡ß▼┐π}°ï»┌G╜₧╧εo»〜°0o╞W/_╝ƒL¢\'v╘▓ú5;Ω░#第... 

有没有办法在Postgres中创建数据库/表/列而不进行编码?如果没有，我应该如何存储此信息?我尝试使用pg_escape_bytea，但是在尝试解压缩内容时会产生错误.不确定这是否真的很重要，但是这是我用来写入数据库的PHP:

  $ content = file_get_contents($ zipLocation);$ content =加号($ content);$ sql ="INSERT INTO ZIP_TBL(BUILD，CONTENT)VALUES('$ build'，'$ content');如果(！pg_query($ con，$ sql)){die('Error:'.pg_last_error($ con));} 

解决方案

bytea 输入格式之一是十六进制.因此，请使用 bin2hex

  $ content = file_get_contents($ zipLocation);$ content ='\\ x'.bin2hex($ content);$ sql =插入zip_tbl(构建，内容)值('$ build'，E'$ content'); 

http://www.postgresql.org/docs/current/static/datatype-binary.html#AEN5318

http://php.net/manual/en/function.bin2hex.php

顺便说一句，如果您不知道，则很容易受到SQL注入的攻击.<​​/p>

I've been storing the contents of zip files in a LONGBLOB in a MySQL database, but I'm moving to Postgres. From what I've read, the equivalent to LONGBLOB in Postgres is bytea. Unfortunately, I can't get the zip contents to write to the database. First, I got this error:

Warning: pg_query(): Query failed: ERROR:  invalid byte sequence for encoding "UTF8"
 0x5c

Then I created a new database with SQL_ASCII encoding (the previous had UTF8), and got this error:

PHP Warning:  pg_query(): Query failed: ERROR:  syntax error at or near "v╘▓ú5"
LINE 2: ...√╢V[úB√▬┌»å⌐²└ù╙±b±≡ß▼┐π}°ï»┌G╜₧╧εo»~°0o╞W/_╝ƒL¢\'v╘▓ú5;Ω░#╩...

Is there any way to create a database/table/column in Postgres without encoding? If not, how should I store this information? I tried using pg_escape_bytea but that produces errors when I try to unzip the contents. Not sure that this really matters, but here's the PHP I'm using to write to the database:

$content = file_get_contents($zipLocation);
$content = addslashes($content);

$sql="INSERT INTO ZIP_TBL ( BUILD, CONTENT)
    VALUES ('$build', '$content')";

if (!pg_query($con,$sql)) {
    die('Error: ' . pg_last_error($con));
}

解决方案

One of the bytea input formats is hexadecimal. So use bin2hex

$content = file_get_contents($zipLocation);
$content = '\\x' . bin2hex($content);

$sql="
    insert into zip_tbl ( build, content)
    values ('$build', E'$content')
";

http://www.postgresql.org/docs/current/static/datatype-binary.html#AEN5318

http://php.net/manual/en/function.bin2hex.php

BTW, if you are not aware, you are susceptible to SQL injection.

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