ngx_http_fastcgi_module.c

Nginx ("engine x") 是一个高性能的 HTTP 和 反向代理 服务器

    ngx_conf_merge_msec_value(conf->upstream.read_timeout,
                              prev->upstream.read_timeout, 60000);

    ngx_conf_merge_size_value(conf->upstream.send_lowat,
                              prev->upstream.send_lowat, 0);

    ngx_conf_merge_size_value(conf->upstream.buffer_size,
                              prev->upstream.buffer_size,
                              (size_t) ngx_pagesize);


    ngx_conf_merge_bufs_value(conf->upstream.bufs, prev->upstream.bufs,
                              8, ngx_pagesize);

    if (conf->upstream.bufs.num < 2) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                           "there must be at least 2 \"fastcgi_buffers\"");
        return NGX_CONF_ERROR;
    }


    size = conf->upstream.buffer_size;
    if (size < conf->upstream.bufs.size) {
        size = conf->upstream.bufs.size;
    }


    ngx_conf_merge_size_value(conf->upstream.busy_buffers_size_conf,
                              prev->upstream.busy_buffers_size_conf,
                              NGX_CONF_UNSET_SIZE);

    if (conf->upstream.busy_buffers_size_conf == NGX_CONF_UNSET_SIZE) {
        conf->upstream.busy_buffers_size = 2 * size;
    } else {
        conf->upstream.busy_buffers_size =
                                         conf->upstream.busy_buffers_size_conf;
    }

    if (conf->upstream.busy_buffers_size < size) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
             "\"fastcgi_busy_buffers_size\" must be equal or bigger than "
             "maximum of the value of \"fastcgi_buffer_size\" and "
             "one of the \"fastcgi_buffers\"");

        return NGX_CONF_ERROR;
    }

    if (conf->upstream.busy_buffers_size
        > (conf->upstream.bufs.num - 1) * conf->upstream.bufs.size)
    {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
             "\"fastcgi_busy_buffers_size\" must be less than "
             "the size of all \"fastcgi_buffers\" minus one buffer");

        return NGX_CONF_ERROR;
    }


    ngx_conf_merge_size_value(conf->upstream.temp_file_write_size_conf,
                              prev->upstream.temp_file_write_size_conf,
                              NGX_CONF_UNSET_SIZE);

    if (conf->upstream.temp_file_write_size_conf == NGX_CONF_UNSET_SIZE) {
        conf->upstream.temp_file_write_size = 2 * size;
    } else {
        conf->upstream.temp_file_write_size =
                                      conf->upstream.temp_file_write_size_conf;
    }

    if (conf->upstream.temp_file_write_size < size) {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
             "\"fastcgi_temp_file_write_size\" must be equal or bigger than "
             "maximum of the value of \"fastcgi_buffer_size\" and "
             "one of the \"fastcgi_buffers\"");

        return NGX_CONF_ERROR;
    }


    ngx_conf_merge_size_value(conf->upstream.max_temp_file_size_conf,
                              prev->upstream.max_temp_file_size_conf,
                              NGX_CONF_UNSET_SIZE);

    if (conf->upstream.max_temp_file_size_conf == NGX_CONF_UNSET_SIZE) {
        conf->upstream.max_temp_file_size = 1024 * 1024 * 1024;
    } else {
        conf->upstream.max_temp_file_size =
                                        conf->upstream.max_temp_file_size_conf;
    }

    if (conf->upstream.max_temp_file_size != 0
        && conf->upstream.max_temp_file_size < size)
    {
        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
             "\"fastcgi_max_temp_file_size\" must be equal to zero to disable "
             "the temporary files usage or must be equal or bigger than "
             "maximum of the value of \"fastcgi_buffer_size\" and "
             "one of the \"fastcgi_buffers\"");

        return NGX_CONF_ERROR;
    }


    ngx_conf_merge_bitmask_value(conf->upstream.next_upstream,
                              prev->upstream.next_upstream,
                              (NGX_CONF_BITMASK_SET
                               |NGX_HTTP_UPSTREAM_FT_ERROR
                               |NGX_HTTP_UPSTREAM_FT_TIMEOUT));

    if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) {
        conf->upstream.next_upstream = NGX_CONF_BITMASK_SET
                                       |NGX_HTTP_UPSTREAM_FT_OFF;
    }

    ngx_conf_merge_path_value(conf->upstream.temp_path,
                              prev->upstream.temp_path,
                              NGX_HTTP_FASTCGI_TEMP_PATH, 1, 2, 0,
                              ngx_garbage_collector_temp_handler, cf);

    ngx_conf_merge_value(conf->upstream.pass_request_headers,
                              prev->upstream.pass_request_headers, 1);
    ngx_conf_merge_value(conf->upstream.pass_request_body,
                              prev->upstream.pass_request_body, 1);

    ngx_conf_merge_value(conf->upstream.intercept_errors,
                              prev->upstream.intercept_errors, 0);

    ngx_conf_merge_ptr_value(conf->catch_stderr, prev->catch_stderr, NULL);


    ngx_conf_merge_str_value(conf->index, prev->index, "");

    if (conf->upstream.hide_headers == NULL
        && conf->upstream.pass_headers == NULL)
    {
        conf->upstream.hide_headers = prev->upstream.hide_headers;
        conf->upstream.pass_headers = prev->upstream.pass_headers;
        conf->upstream.hide_headers_hash = prev->upstream.hide_headers_hash;

        if (conf->upstream.hide_headers_hash.buckets) {
            goto peers;
        }

    } else {
        if (conf->upstream.hide_headers == NULL) {
            conf->upstream.hide_headers = prev->upstream.hide_headers;
        }

        if (conf->upstream.pass_headers == NULL) {
            conf->upstream.pass_headers = prev->upstream.pass_headers;
        }
    }

    if (ngx_array_init(&hide_headers, cf->temp_pool, 4, sizeof(ngx_hash_key_t))
        != NGX_OK)
    {
        return NGX_CONF_ERROR;
    }

    for (header = ngx_http_fastcgi_hide_headers; header->len; header++) {
        hk = ngx_array_push(&hide_headers);
        if (hk == NULL) {
            return NGX_CONF_ERROR;
        }

        hk->key = *header;
        hk->key_hash = ngx_hash_key_lc(header->data, header->len);
        hk->value = (void *) 1;
    }

    if (conf->upstream.hide_headers) {

        header = conf->upstream.hide_headers->elts;

        for (i = 0; i < conf->upstream.hide_headers->nelts; i++) {

            hk = hide_headers.elts;

            for (j = 0; j < hide_headers.nelts; j++) {
                if (ngx_strcasecmp(header[i].data, hk[j].key.data) == 0) {
                    goto exist;
                }
            }

            hk = ngx_array_push(&hide_headers);
            if (hk == NULL) {
                return NGX_CONF_ERROR;
            }

            hk->key = header[i];
            hk->key_hash = ngx_hash_key_lc(header[i].data, header[i].len);
            hk->value = (void *) 1;

        exist:

            continue;
        }
    }

    if (conf->upstream.pass_headers) {

        hk = hide_headers.elts;
        header = conf->upstream.pass_headers->elts;

        for (i = 0; i < conf->upstream.pass_headers->nelts; i++) {

            for (j = 0; j < hide_headers.nelts; j++) {

                if (hk[j].key.data == NULL) {
                    continue;
                }

                if (ngx_strcasecmp(header[i].data, hk[j].key.data) == 0) {
                    hk[j].key.data = NULL;
                    break;
                }
            }
        }
    }

    hash.hash = &conf->upstream.hide_headers_hash;
    hash.key = ngx_hash_key_lc;
    hash.max_size = 512;
    hash.bucket_size = ngx_align(64, ngx_cacheline_size);
    hash.name = "fastcgi_hide_headers_hash";
    hash.pool = cf->pool;
    hash.temp_pool = NULL;

    if (ngx_hash_init(&hash, hide_headers.elts, hide_headers.nelts) != NGX_OK) {
        return NGX_CONF_ERROR;
    }

peers:

    if (conf->upstream.upstream == NULL) {
        conf->upstream.upstream = prev->upstream.upstream;
        conf->upstream.schema = prev->upstream.schema;
    }

    if (conf->params_source == NULL) {
        conf->flushes = prev->flushes;
        conf->params_len = prev->params_len;
        conf->params = prev->params;
        conf->params_source = prev->params_source;

        if (conf->params_source == NULL) {
            return NGX_CONF_OK;
        }
    }

    conf->params_len = ngx_array_create(cf->pool, 64, 1);
    if (conf->params_len == NULL) {
        return NGX_CONF_ERROR;
    }

    conf->params = ngx_array_create(cf->pool, 512, 1);
    if (conf->params == NULL) {
        return NGX_CONF_ERROR;
    }

    src = conf->params_source->elts;
    for (i = 0; i < conf->params_source->nelts; i++) {

        if (ngx_http_script_variables_count(&src[i].value) == 0) {
            copy = ngx_array_push_n(conf->params_len,
                                    sizeof(ngx_http_script_copy_code_t));
            if (copy == NULL) {
                return NGX_CONF_ERROR;
            }

            copy->code = (ngx_http_script_code_pt)
                                                  ngx_http_script_copy_len_code;
            copy->len = src[i].key.len;


            copy = ngx_array_push_n(conf->params_len,
                                    sizeof(ngx_http_script_copy_code_t));
            if (copy == NULL) {
                return NGX_CONF_ERROR;
            }

            copy->code = (ngx_http_script_code_pt)
                                                 ngx_http_script_copy_len_code;
            copy->len = src[i].value.len;


            size = (sizeof(ngx_http_script_copy_code_t)
                       + src[i].key.len + src[i].value.len
                       + sizeof(uintptr_t) - 1)
                    & ~(sizeof(uintptr_t) - 1);

            copy = ngx_array_push_n(conf->params, size);
            if (copy == NULL) {
                return NGX_CONF_ERROR;
            }

            copy->code = ngx_http_script_copy_code;
            copy->len = src[i].key.len + src[i].value.len;

            p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);

            p = ngx_cpymem(p, src[i].key.data, src[i].key.len);
            ngx_memcpy(p, src[i].value.data, src[i].value.len);

        } else {
            copy = ngx_array_push_n(conf->params_len,
                                    sizeof(ngx_http_script_copy_code_t));
            if (copy == NULL) {
                return NGX_CONF_ERROR;
            }

            copy->code = (ngx_http_script_code_pt)
                                                 ngx_http_script_copy_len_code;
            copy->len = src[i].key.len;


            size = (sizeof(ngx_http_script_copy_code_t)
                    + src[i].key.len + sizeof(uintptr_t) - 1)
                    & ~(sizeof(uintptr_t) - 1);

            copy = ngx_array_push_n(conf->params, size);
            if (copy == NULL) {
                return NGX_CONF_ERROR;
            }

            copy->code = ngx_http_script_copy_code;
            copy->len = src[i].key.len;

            p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
            ngx_memcpy(p, src[i].key.data, src[i].key.len);


            ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));

            sc.cf = cf;
            sc.source = &src[i].value;
            sc.flushes = &conf->flushes;
            sc.lengths = &conf->params_len;
            sc.values = &conf->params;

            if (ngx_http_script_compile(&sc) != NGX_OK) {
                return NGX_CONF_ERROR;
            }
        }

        code = ngx_array_push_n(conf->params_len, sizeof(uintptr_t));
        if (code == NULL) {
            return NGX_CONF_ERROR;
        }

        *code = (uintptr_t) NULL;


        code = ngx_array_push_n(conf->params, sizeof(uintptr_t));
        if (code == NULL) {
            return NGX_CONF_ERROR;
        }

        *code = (uintptr_t) NULL;
    }

    code = ngx_array_push_n(conf->params_len, sizeof(uintptr_t));
    if (code == NULL) {
        return NGX_CONF_ERROR;
    }

    *code = (uintptr_t) NULL;

    return NGX_CONF_OK;
}


static ngx_int_t
ngx_http_fastcgi_script_name_variable(ngx_http_request_t *r,
    ngx_http_variable_value_t *v, uintptr_t data)
{
    u_char                       *p;
    ngx_http_fastcgi_loc_conf_t  *flcf;

    if (r->uri.len) {
        v->valid = 1;
        v->no_cacheable = 0;
        v->not_found = 0;

        flcf = ngx_http_get_module_loc_conf(r, ngx_http_fastcgi_module);

        if (r->uri.data[r->uri.len - 1] != '/') {
            v->len = r->uri.len;
            v->data = r->uri.data;
            return NGX_OK;
        }

        v->len = r->uri.len + flcf->index.len;

        v->data = ngx_palloc(r->pool, v->len);
        if (v->data == NULL) {
            return NGX_ERROR;
        }

        p = ngx_copy(v->data, r->uri.data, r->uri.len);
        ngx_memcpy(p, flcf->index.data, flcf->index.len);

    } else {
        v->len = 0;
        v->valid = 1;
        v->no_cacheable = 0;
        v->not_found = 0;
        v->data = NULL;

        return NGX_OK;
    }

    return NGX_OK;
}


static char *
ngx_http_fastcgi_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
    ngx_http_fastcgi_loc_conf_t *lcf = conf;

    ngx_url_t                    u;
    ngx_str_t                   *value;
    ngx_http_core_loc_conf_t    *clcf;

    if (lcf-