如何将mod_deflate首选压缩方法设置为放气

Question

mod_deflate总是发送 gzip 请求标题时数据 Accept-Encoding 是 gip, deflate.

我该如何告诉mod_deflate希望发送 deflate （不是 zlib） 代替 gzip?

如果这不可能...为什么Develpers在无法放气时会命名模块MOD_DEFLATE。另外，对于我提交错误报告以在将来发布的情况下，最好的方法（如果有的话）是什么？

Answer 1

看了看 mod_deflate的源代码 我得出的结论是，除了Gzip以外，不可能发送任何其他内容。

现在，我不是 c 程序员和我认为我无法自己提交任何补丁...但是从消息来源，我可以看到有几件事需要修复（警告，我从来没有写过任何c .. 。所以这可能完全是错误的）

/* add this method */
static const char *deflate_set_preferred_method(cmd_parms *cmd, void *dummy,
                                const char *arg1)
{
    deflate_filter_config *c = ap_get_module_config(cmd->server->module_config,
                                                &deflate_module);

    if (arg2 != NULL && (!strcasecmp(arg1, "deflate") || !strcasecmp(arg1, "gzip") || !strcasecmp(arg1, "zlib") ) ) {
        c->preferred_method = apr_pstrdup(cmd->pool, arg1);
    }
    else {
        return apr_psprintf(cmd->pool, "Unknown preferred method type %s", arg1);
    }

    return NULL;
}

/* update some code to define "preferred_method" */


/* 
   Update all code that references the string "gzip" to take 
   into account "deflate", and "zlib" as well.

   This is the part I really have no clue how to do.
   lines: 539, 604, 607, 616, and 624 should be updates

   line 624 could read something like this: */

if( !strcasecmp(preferred_method,"gzip") ){
    /* add immortal gzip header */
    e = apr_bucket_immortal_create(gzip_header, sizeof gzip_header,
                                   f->c->bucket_alloc);
    APR_BRIGADE_INSERT_TAIL(ctx->bb, e);
}
else if( !strcasecmp(preferred_method, "zlib") ){
   /* do something to add the zlib headers here */
}

/* update this method */
static const command_rec deflate_filter_cmds[] = {
    AP_INIT_TAKE12("DeflateFilterNote", deflate_set_note, NULL, RSRC_CONF,
                  "Set a note to report on compression ratio"),
    AP_INIT_TAKE1("DeflateWindowSize", deflate_set_window_size, NULL,
                  RSRC_CONF, "Set the Deflate window size (1-15)"),
    AP_INIT_TAKE1("DeflateBufferSize", deflate_set_buffer_size, NULL, RSRC_CONF,
                  "Set the Deflate Buffer Size"),
    AP_INIT_TAKE1("DeflateMemLevel", deflate_set_memlevel, NULL, RSRC_CONF,
                  "Set the Deflate Memory Level (1-9)"),
    AP_INIT_TAKE1("DeflateCompressionLevel", deflate_set_compressionlevel, NULL, RSRC_CONF,
                  "Set the Deflate Compression Level (1-9)"),
    AP_INIT_TAKE1("DeflatePreferredMethod", deflate_set_preferred_method, NULL, RSRC_CONF,
                  "Set the Preferred Compression Method: deflate, gzip, or zlib (not-recommended)"),
    {NULL}
};