Flickr JSON parsing - noob! - Processing Forum

hellow0rld

Flickr JSON parsing - noob!

in Contributed Library Questions • 1 year ago

Hello all.

I'm new to programming and i need some help from the gurus / sifus / anyone at all.

I'm trying to parse flickr json to get metadata of the photos. I tried google - but no luck getting an answer. So, I thought maybe posting my question here would help me get the info i need. Any input would be greatly appreciated.

Here's what i have so far.

import org.json.*;

String api = "http://api.flickr.com/services/rest/?method=flickr.photos.search&";

void setup() {

getFlickrData();

}

void getFlickrData() {

String request = api + "&tags=sky&has_geo=1&per_page=25&format=json&nojsoncallback=1&extras=geo&api_key=*******";

println(request);

String result = join( loadStrings( request ), "");

//println(result);

try {

JSONObject flickrData = new JSONObject(join(loadStrings(request), ""));

//JSONArray photos = flickrData.getJSONArray("photos");

println(flickrData.getString("photos"));

for (int i = 0; i < photos.length(); i++){

JSONObject flickrImg = (JSONObject) photos.get(i);

JSONArray flickrPhoto = flickrImg.getJSONArray("photo");

JSONObject photo = (JSONObject) flickrPhoto.get(0);

println("\nLongitude : " + photo.getString("longitude"));

} */

}

catch (JSONException e) {

println ("There was an error parsing the JSONObject.");

};

Replies(9)

Chrisir

Re: Flickr JSON parsing - noob!

1 year ago

did you read

https://forum.processing.org/topic/simple-json-example-with-api

hellow0rld

Re: Flickr JSON parsing - noob!

1 year ago

Thanks for the link Chrisir!

I looked at your example, and it gave me a better idea on how to approach my problem.

From your example, i noticed you added some extra strings to your json header. Maybe in my case erasing some of it would work?

This the json i have:

{ "photos" : { "page" : 1,

"pages" : 60748,

"perpage" : 25,

"photo" : [ { "accuracy" : "13",

"context" : 0,

"farm" : 8,

"geo_is_contact" : 0,

"geo_is_family" : 0,

"geo_is_friend" : 0,

"geo_is_public" : 1,

"id" : "****",

"isfamily" : 0,

"isfriend" : 0,

"ispublic" : 1,

"latitude" : 39.816744,

"longitude" : -74.544381999999999,

How do i erase the first few lines out? (and the last lines too?, to avoid messing up the syntax, right?)

I want to erase { "photos" : { "page" : 1, "pages" : 60748, "perpage" : 25,

and have it start from "photo" : [ { "accuracy" : "13",

I'm not sure if this would even work. Any other suggestion will be greatly appreciated.

Chrisir

Re: Flickr JSON parsing - noob!

1 year ago

test this

import org.json.*;
String api = "http://api.flickr.com/services/rest/?method=flickr.photos.search&";
void setup() {
getFlickrData();
}
void getFlickrData() {
String request = api + "&tags=sky&has_geo=1&per_page=25&format=json&nojsoncallback=1&extras=geo&api_key=*******";
println(request);
String result = join( loadStrings( request ), "");
//println(result);
try {
JSONObject flickrData = new JSONObject(join(loadStrings(request), ""));
//JSONArray photos = flickrData.getJSONArray("photos");
// println(flickrData.getString("photos"));
JSONArray results = flickrData.getJSONArray("photos");
println("----------------------");
int numberOfElements = results.length();
for (int j = 0; j < numberOfElements; j++) {
JSONObject entry = results.getJSONObject(j);
/*
println (entry.getString("img_src"));
println (entry.getString("title"));
println (entry.getString("teaser"));
println (entry.getString("url"));
*/
//PImage img1;
//img1 = loadImage(entry.getString("img_src"), "jpg"); //
//image(img1, 4, j*95+23);
PFont myFont=createFont("FFScala-32.vlw",16);
textFont(myFont, 18);
text (entry.getString("accuracy"), 144, j*95+39 );
textFont(myFont, 14);
text (entry.getString("context"), 144, j*95+53 );
text (entry.getString("latitude"), 144, j*95+83 );
println ("----------------------");
}
/*
for (int i = 0; i < photos.length(); i++){
JSONObject flickrImg = (JSONObject) photos.get(i);
JSONArray flickrPhoto = flickrImg.getJSONArray("photo");
JSONObject photo = (JSONObject) flickrPhoto.get(0);
println("\nLongitude : " + photo.getString("longitude"));
} */
}
catch (JSONException e) {
println ("There was an error parsing the JSONObject.");
}
}

hellow0rld

Re: Flickr JSON parsing - noob!

1 year ago

That didn't work. It printed the error parsing message.

I tried something similar to this too after looking at your example from the link you gave in your first post.

But it doesn't work for what i have.

Chrisir

Re: Flickr JSON parsing - noob!

1 year ago

I can't test it since I don't have the api-key

did you try the singular?

Instead of

JSONArray results = flickrData.getJSONArray("photos");

try

JSONArray results = flickrData.getJSONArray("photo");

hellow0rld

Re: Flickr JSON parsing - noob!

1 year ago

Yup, i tried that too. Same results.

If you want, i could PM you my apikey.

This is what i have to do right? I need to get into the json object (photos), then get into the json array (photo) to get the data out.

{ "photos" : { "page" : 1,

"pages" : 60748,

"perpage" : 25,

"photo" : [ { "accuracy" : "13",

"context" : 0,

"farm" : 8,

"geo_is_contact" : 0,

"geo_is_family" : 0,

"geo_is_friend" : 0,

"geo_is_public" : 1,

"id" : "****",

"isfamily" : 0,

"isfriend" : 0,

"ispublic" : 1,

"latitude" : 39.816744,

"longitude" : -74.544381999999999,

Chrisir

Re: Flickr JSON parsing - noob!

1 year ago

ok...

import org.json.*;
String api = "http://api.flickr.com/services/rest/?method=flickr.photos.search";
void setup() {
size (700, 650);
getFlickrData();
}
void getFlickrData() {
String request = api + "&tags=sky&has_geo=1&per_page=25&format=json&nojsoncallback=1&extras=geo&api_key=****";
println(request);
String result = join( loadStrings( request ), "");
//println(result);
try {
JSONObject flickrData = new JSONObject(join(loadStrings(request), ""));
//JSONArray photos = flickrData.getJSONArray("photos");
println("test1");
println( flickrData );
// println(flickrData.getString("photos"));
println("test2");
JSONObject flickrData2 = new JSONObject(flickrData.getString("photos") ) ;
// JSONObject results = flickrData.JSONObject(0);
// JSONArray results = flickrData.getJSONArray("photo");
// JSONArray results = flickrData.getJSONArray("photos");
// JSONObject jsonobj2 = flickrData.JSONObject("photo");
println("test3 ----------------------------------------------------------------------");
println( flickrData2 );
println("test4");
JSONArray results = flickrData2.getJSONArray("photo");
println("test5");
println("------------------------------------------------------------------------------");
println("=======================================");
int numberOfElements = results.length();
int lineNum=1;
int factor1= 110;
int factor2= 25;
for (int j = 0; j < numberOfElements; j++) {
JSONObject entry = results.getJSONObject(j);
println ("Now we show entry # " + j );
println (entry);
//PImage img1;
//img1 = loadImage(entry.getString("img_src"), "jpg"); //
//image(img1, 4, j*95+23);
PFont myFont=createFont("FFScala-32.vlw", 16);
textFont(myFont, 18);
lineNum= 1;
text (entry.getString("title"), 44, j*factor1+lineNum*factor2 );
lineNum++;
text (entry.getString("accuracy"), 44, j*factor1+lineNum*factor2 );
lineNum++;
textFont(myFont, 14);
text (entry.getString("context"), 44, j*factor1+lineNum*factor2 );
lineNum++;
text (entry.getString("latitude"), 44, j*factor1+lineNum*factor2 );
lineNum++;
//
println ("----------------------");
}
/*
for (int i = 0; i < photos.length(); i++){
JSONObject flickrImg = (JSONObject) photos.get(i);
JSONArray flickrPhoto = flickrImg.getJSONArray("photo");
JSONObject photo = (JSONObject) flickrPhoto.get(0);
println("\nLongitude : " + photo.getString("longitude"));
} */
}
catch (JSONException e) {
println ("There was an error parsing the JSONObject.");
}
}

hellow0rld

Re: Flickr JSON parsing - noob!

1 year ago

Awesome! Thanks a lot Chrisir. Owe you one.

Got to study your code now. Cheers.

Chrisir

Re: Flickr JSON parsing - noob!

1 year ago

there were some things hard to track down.
e.g. your

String api = "http://api.flickr.com/services/rest/?method=flickr.photos.search&";

end with a &
but your

String request = api + "&tags=sky&has_geo=1&per_page=25&format=json&nojsoncallback=1&extras=geo&api_key=*******";

also starts with a & , so you had a duplicate && - doesn't work I think...

Glad to hear that I could help!

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