[PHP-DEV] PHP 4.0 Bug #7880 Updated: PHP_URL_FOPEN doesn't work From: Alan <email protected>
Date: 12/30/00

ID: 7880
User Update by: Alan <email protected>
Status: Closed
Bug Type: *URL Functions
Description: PHP_URL_FOPEN doesn't work

Ok - I seem to have tracked this down. I added debug statements throughout
PHP to see exactly where it was failing, and found that it is happening in:
php_network_getaddresses in main/network.c. Basically, in
php_fopen_url_wrap_http in ext/standard/http_fopen_wrapper.c, I modified the
function to let me know where it was bailing:

*socketd = php_hostconnect(resource->host, resource->port, SOCK_STREAM, 0);
    if (*socketd == -1) {
        php_error(E_WARNING, "php_hostconnect failed");
        SOCK_FCLOSE(*socketd);
        *socketd = 0;
        free_url(resource);
        return NULL;
    }

It does get to that php_error message, and so after looking through
php_hostconnect, I found that our problem was a failed lookup in
php_network_getaddresses. Here is my slightly modified code that prints out
an error message when getaddrinfo fails:
static int php_network_getaddresses(const char *host, struct sockaddr
***sal)
{
  int err;
  struct sockaddr **sap;

  if (host != NULL) {
#ifdef HAVE_GETADDRINFO
    struct addrinfo hints, *res, *sai;
    int n;

    memset( &hints, '\0', sizeof(hints) );
    hints.ai_family = AF_UNSPEC;
    if ((err = getaddrinfo(host, NULL, &hints, &res))) {
      php_error(E_WARNING, "getaddrinfo failed for host: %s with error: %d",
host, err);
      php_error(E_WARNING, gai_strerror(err));
      return -1;
    }
I took a look at php 4.0.2 (which is working fine for us), and saw that it
doesn't use getaddrinfo for hostname lookups, it uses the gethostbyname
function.

I'm not familiar enough with the getaddrinfo call to tell you if it is
failing because of a bug in Solaris, a problem in our system configuration,
or if it is a problem with the php source.

I have created two testpages that are failing for us, one with a numeric IP
address and another with a hostname that must be resolved. You can view
them here:

Use of the "file" function on a numeric address:
http://pkw.devilnet.duke.edu/testweather.php

Use of the "file" function on a hostname that must be resolved:
http://dev.dspconline.org/scripts/update_weather.php

I hope this helps.

Previous Comments:
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[2000-12-30 19:55:06] sniper <email protected>
No feedback. Reopen if this really doesn't work with correct url.

--Jani

---------------------------------------------------------------------------

[2000-11-20 11:45:08] jason <email protected>
Ya you should be looking up index.php as hholzgra suggests,
but in looking at your truss output, It is behaving as if url wrappers was compiled out.

Can you try this test?

1. Lets verify the source is compiled correctly.
add --enable-debug to your php configure.
a. Remake and make sure that gcc is being called with -g. b. do a gdb httpd
c. run -X
d. hit ctrl-c (it might take a while to catch)
e. break php_fopen_wrapper
f. cont
g. open your test-script while its waiting
h. it should break when it trys to make the file request
i. hit n to step to the next line of code
j. see if it ever hits if(!(options & IGNORE_URL)){
k. if url wrappers is not compiled you would get
   if (options & USE_PATH........ instead

---------------------------------------------------------------------------

[2000-11-20 10:22:12] hholzgra <email protected>
ooops, looks like this was to early in the morning :(

but it might still be of interest what the output and
error messages look like if you take your code snippet
and just replace the '$fp=file($url)' line with '$fp=fopen($url,"r")'

it seems like file() fails to open the URL but still tries
to read from the file handle that is not valid in this case,
so that 'bad file number' is reported instead of the real cause
if failure ...

PS: i don't think this is realy related to it, but www.php.net/index.html
does not exist. trying to GET it will result in a 404 status and an
error page showing some search results, you should try
www.php.net/index.php instead, just to be sure ...

---------------------------------------------------------------------------

[2000-11-20 09:54:13] jason <email protected>
Actually he is using the correct usage. File takes a string calls fopen-wrappers to open a fp, and then returns an array

Alan, I will see If I can reproduce your findings

-Jason

---------------------------------------------------------------------------

[2000-11-20 07:01:04] hholzgra <email protected>
   $url = "http://www.php.net/index.html";
   $fp = file($url);

is simply wrong usage, try

   $url = "http://www.php.net/index.html";
   $fp = fopen($url,"r");
   $file_contents = file($fp);

instead

  

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Full Bug description available at: http://bugs.php.net/?id=7880 

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