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Looping though URLs with JSON


By : Kerkenez Kerkenez
Date : August 02 2020, 07:00 AM
may help you . Welcome to the Async world of programming.
$.getJSON function is an async function, it will call your callback when it gets data from the server and network request can complete in any order, means the first request can be complete after the last one.
code :
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>

<div id="measures">loading...</div>       
<script>
function getLevels() {
var upstreamLevels = new Array("L1206", "L1203", "L1202", "L1108", "L1103", "L1308");
var measuresTable = ""; 
var label ="";
function httpGet(url) {
  return new Promise(function (resolve, reject) {
    return $.getJSON(url, resolve)
   });
}
var promises = upstreamLevels.map(function(u) {
  return httpGet("https://environment.data.gov.uk/flood-monitoring/id/measures/"+u+"-level-stage-i-15_min-m/readings?_view=full&_sorted&_limit=3")
})
Promise.all(promises)
.then(function(promiseResp) {
promiseResp.forEach( function(json) {
    label = json["items"][0]["measure"]["station"]["label"];
  measuresTable = measuresTable + '<p>Station Name ' + label + '</div>';
  $("#measures").html(measuresTable); 
})

})
}

window.onload = getLevels();
 </script> 
`https://environment.data.gov.uk/flood-monitoring/id/measures/"${upstreamLevel}+"-level-stage-i-15_min-m/readings?_view=full&_sorted&_limit=3`


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BeautifulSoup looping through urls


By : user2966341
Date : March 29 2020, 07:55 AM
seems to work fine Follow the pagination by making an endless loop and follow the "Next" link until it is not found.
In other words, from:
code :
from urlparse import urljoin

import requests
from bs4 import BeautifulSoup

base_url = 'http://www.chess.com/'
game_ids = []

next_page = 'http://www.chess.com/home/game_archive?sortby=&show=live&member=Hikaru'
while True:
    soup = BeautifulSoup(requests.get(next_page).content)

    # collect the game ids
    for link in soup.select('a[href^=/livechess/game?id=]'):
        gameid = link['href'].split("?id=")[1]
        game_ids.append(int(gameid))

    try:
        next_page = urljoin(base_url, soup.select('ul.pagination li.next-on a')[0].get('href'))
    except IndexError:
        break  # exiting the loop if "Next" link not found

print game_ids

Looping over URLs in Casperjs


By : user2995702
Date : March 29 2020, 07:55 AM
will be helpful for those in need The problem is that casper.open doesn't add a step, so it is not asynchronous (like thenOpen). It is immediately executed inside of the outer then. But the following then is asynchronous so its step is added to be executed after the current step (outer then). Both opens are executed, but the callbacks of both thens are executed after the last open.
So the solution would be to use thenOpen as a combined asynchronous step. There is a slight problem with the straigt forward solution:
code :
for item, idx in items
    ((item, idx) ->
        casper.thenOpen item, () ->
            this.capture idx + '.png'
    )(item, idx)
items.forEach (item, idx) ->
    casper.thenOpen item, () ->
        this.capture idx + '.png'

Converting JSON urls to regular urls from an ajax call


By : abha agrawal
Date : March 29 2020, 07:55 AM
Hope that helps If you don't want to lock down yourself with .json hard-coded extension, you can get the lastIndexOf of . & get the substring from 0.
I guess this will do the trick!
code :
var url = data.url;
console.log(url.substring(0, url.lastIndexOf('.')));

Looping through URLs in R


By : Jinxuan Lin
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further The problem is you use url in your function while you would rather use x that is the current item being iterated
Try with
code :
url <- c("www.domain.com/something-else_uniqueID",
         "www.domain.com/something-else_uniqueID2",
         "www.domain.com/something-else_uniqueID3")

Reduce(function(...) merge(..., all=T), 
    lapply(url, function(x) {
       data.frame(url=x, 
           category=category <- read_html(x) %>%
                   html_nodes(xpath = '//*[@id="content-anchor"]/div[1]/div[2]/div[1]/span[2]/a') %>%
                   html_text(),

           sub_category=sub_category <- read_html(x) %>%
                   html_nodes(xpath = '//*[@id="content-anchor"]/div[1]/div[2]/div[1]/span[3]/a') %>%
                   html_text(),

           section=section <- read_html(x) %>%
                   html_nodes(xpath = '//*[@id="content-anchor"]/div[1]/div[2]/div[1]/span[4]/a') %>%
                   html_text())

    })) -> my_effort

write.csv(my_effort, "mydata.csv")

How to make dynamic urls from base urls in a json file


By : Subramanian chinnara
Date : March 29 2020, 07:55 AM
hop of those help? I am making an ajax call to load a json file which has all my REST API urls in it. For urls which are static for eg: /read things work fine. , Define a generic config of how your api variables and their values:
code :
paramConfig = {'{article_id}':    "Your Article Id",
               '{sub_article_id}':"Your subarticle id"
                ...
                ....};
function getAjaxUrl(rawUr){
        for(var param in paramConfig){
            rawUrl = rawUrl.replace(param,paramConfig[param]);
           }

        return rawUrl;
}
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