Question

我在websocket握手期间遇到了错误。 Firefox无法在ws：// localhost：8082 / FetchNotification / NewFile.htmlatpendpoint建立与服务器的连接是否有人遇到同样的问题。我已经提到了代码 https://dzone.com/articles/wso2-products-resolving-err-ssl-weak-ephemeral-dh

Answer 1

如果对WebSocket端点的请求正确，则端点返回＆＃34; 101 Switching Protocols＆＃34;。否则，端点将返回正常的HTTP响应。

你应该解释你得到的404错误。也就是说，URL的路径部分是错误的并且找不到（404 Not Found）。

Answer 2

您应该用于函数调用的URL

use strict;
use warnings;
use DBI;

# ...

# the columns
my $colsf = join ',', @some_list_of_column_names; # also check those!

# the table name
my $table = $q->param('table');
die 'invalid table name' if $table =~ /[^a-zA-Z0-9_]/; # input checking

# where
# I'm skipping this part as I don't know where it is comming from

if ($op eq 'SELECT') {
  my $sql = 'SELECT $colsf FROM $table';
  $sql .= ' WHERE $whr' if $whr;

  my $sth = $dbh->prepare($sql) or die $dbi->errstr;
  $sth->execute;

  my @headings = $sth->{NAME}; # see https://metacpan.org/pod/DBI#NAME1
  while (my $res = $sth->fetchrow_hashref) {
    # do stuff here
  }
}

相反，如果您使用的变量如Echo.connect（“ws：//”+ host +“/ NewFile.html”），请确保它是/FetchNotification/NewFile.html而不是

否则在websocket Endpoint中确保上面的url是你用于

的url

Echo.connect("ws://localhost:8082/FetchNotification/NewFile.html")

失败：WebSocket握手期间出错：意外的响应代码：404

2 个答案: