verify if URLs of pdf documents are valids ?

Programming Questions

mloizix

verify if URLs of pdf documents are valids ?

in Programming Questions • 3 months ago

Hi,
I'd like to verify if many URLs of PDF document are valids or not.
I try first with :

XML xml;
xml = importWML("myURL");
println(xml);

but it returns errors, becasue PDF isn't like XML data.

and I just discovered the createInput function :

InputStream input = createInput("http://www.theses.fr/2006PA083007/document");
println(input);

if the URL is ok it return " sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@556917ee" else " null".
Do you think this is reliable ?
I mean if Processing return " sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@ + numbers or letters" is that mean the link is valid ?

thanks

Replies(2)

mloizix

Re: verify if URLs of pdf documents are valids ?

3 months ago

ok,
even if this method is valid, I don't manage to make it work, cause I don't manage to manipulate an InputStream...
in my head I have :

String line = "2009TOUR202700";
InputStream input = createInput("http://www.theses.fr/"+line+"/document");
if(input.equals("null")==true){
validURL = "WRONG";
}else{
validURL = "OK";
}
println(validURL);

but if the URL is wrong - like in my exemple - he said "NullPointerExecption" at the line 3.
because if the URL is wrong he don't manage to load the InputStream, even if he print "null" in the console :
"null" is not like a string woh has the character : "null" !
boring,
if you have some idea ,
thanks

Mushussu

Re: verify if URLs of pdf documents are valids ?

3 months ago

Let see here :

http://processing.org/reference/null.html

String line = "2009TOUR202700";
String validURL;
InputStream input = createInput("http://www.theses.fr/"+line+"/document");
if (input == null) {
validURL = "WRONG";
}
else {
validURL = "OK";
}
println(validURL);