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Inspect Content-Length header, fixes #23
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1 parent 7b33e4c commit 98a0333197bf2c9c2150942b8149c8b8f8a9de41
@Andreas Jaggi Andreas Jaggi authored on 9 Sep 2011
x-way committed on 9 Sep 2011
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 README
Limitations
Currently only inspects the following headers: Range, If-Range,
If-Unmodified-Since, If-Modified-Since, Date, Accept-Encoding,
Accept-Language, Accept-Charset, Max-Forwards, If-Match,
If-None-Match, Last-Modified
If-None-Match, Last-Modified, Content-Length
 
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Create a ticket on the issue tracking interface of GitHub:
http://github.com/x-way/ngx_http_header_inspect/issues
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 ngx_http_header_inspect.c
static ngx_int_t ngx_header_inspect_range_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
static ngx_int_t ngx_header_inspect_acceptencoding_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
static ngx_int_t ngx_header_inspect_acceptlanguage_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
static ngx_int_t ngx_header_inspect_acceptcharset_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
static ngx_int_t ngx_header_inspect_maxforwards_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
static ngx_int_t ngx_header_inspect_digit_header(char* header, ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
static ngx_int_t ngx_header_inspect_ifmatch_header(char* header, ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
static ngx_int_t ngx_header_inspect_ifrange_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value);
static ngx_int_t ngx_header_inspect_date_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, char *header, ngx_str_t value);
static ngx_int_t ngx_header_inspect_process_request(ngx_http_request_t *r);
 
return rc;
}
 
static ngx_int_t ngx_header_inspect_maxforwards_header(ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value) {
static ngx_int_t ngx_header_inspect_digit_header(char* header, ngx_header_inspect_loc_conf_t *conf, ngx_log_t *log, ngx_str_t value) {
ngx_uint_t i = 0;
 
if ( value.len <= 0 ) {
ngx_log_error(NGX_LOG_ALERT, log, 0, "header_inspect: Max-Forwards header \"%s\" is empty", value.data);
if ( conf->log ) {
ngx_log_error(NGX_LOG_ALERT, log, 0, "header_inspect: %s header \"%s\" is empty", header, value.data);
}
return NGX_ERROR;
}
 
for ( i = 0; i < value.len; i++ ) {
if ( (value.data[i] < '0') || (value.data[i] > '9') ) {
ngx_log_error(NGX_LOG_ALERT, log, 0, "header_inspect: invalid digit at position %d in Max-Forwards header \"%s\"", i, value.data);
if ( conf->log ) {
ngx_log_error(NGX_LOG_ALERT, log, 0, "header_inspect: invalid digit at position %d in %s header \"%s\"", i, header, value.data);
}
return NGX_ERROR;
}
}
 
rc = ngx_header_inspect_acceptcharset_header(conf, r->connection->log, h[i].value);
if ((rc != NGX_OK) && conf->block) {
return NGX_HTTP_BAD_REQUEST;
}
} else if ((h[i].key.len == 14) && (ngx_strcmp("Content-Length", h[i].key.data) == 0) ) {
rc = ngx_header_inspect_digit_header("Content-Length", conf, r->connection->log, h[i].value);
if ((rc != NGX_OK) && conf->block) {
return NGX_HTTP_BAD_REQUEST;
}
} else if ((h[i].key.len == 12) && (ngx_strcmp("Max-Forwards", h[i].key.data) == 0) ) {
rc = ngx_header_inspect_maxforwards_header(conf, r->connection->log, h[i].value);
rc = ngx_header_inspect_digit_header("Max-Forwards", conf, r->connection->log, h[i].value);
if ((rc != NGX_OK) && conf->block) {
return NGX_HTTP_BAD_REQUEST;
}
} else if ((h[i].key.len == 8) && (ngx_strcmp("If-Match", h[i].key.data) == 0) ) {