使用来自R的接口搜索eBay

Question

我正在尝试使用R在站点的API上使用eBay进行搜索。然而，我完全不知所措，不知该如何做。

我熟悉在R中使用其他API，例如Twitter和Instagram。其中一些搜索可以使用专用库(twitteR、streamR等)进行，但我也不得不用httr和RCurl拼凑起来。不幸的是，我在ebay上对这样的方法一点运气都没有。我试过了：

getURL(''http://svcs.ebay.com/services/search/FindingService/v1?OPERATION-NAME=findItemsByKeywords
           &SERVICE-VERSION=1.0.0
           &SECURITY-APPNAME=My_App_ID
           &GLOBAL-ID=EBAY-US
           &RESPONSE-DATA-FORMAT=JSON
           &callback=_cb_findItemsByKeywords
           &REST-PAYLOAD
           &keywords=harry%20potter
           &paginationInput.entriesPerPage=3')

它没有起作用。我也试过了：

 url <- "http://svcs.ebay.com/services/search/FindingService/v1"
 xml.request <- "<?OPERATION-NAME=findItemsByKeywords
 &SERVICE-VERSION=1.0.0
 &SECURITY-APPNAME=My_App_ID
 &GLOBAL-ID=EBAY-US
 &RESPONSE-DATA-FORMAT=XML
 &callback=_cb_findItemsByKeywords
 &REST-PAYLOAD
 &keywords=harry%20potter
 &paginationInput.entriesPerPage=3>"

 myheader=c(Connection="close", 
 'Content-Type' = "application/xml",
 'Content-length' =nchar(xml.request))

  data =  getURL(url = url,
           postfields=xml.request,
           httpheader=myheader,
           verbose=TRUE)

这个也不走运。基本上，我不知道我在做什么。有人能帮上忙吗？

Answer 1

我已经用一个新的名为ebayr的R包包装了ebay的with API，它带有一个httr::GET调用。查看此处：https://github.com/gsimchoni/ebayr

您需要从https://go.developer.ebay.com/获取令牌，然后就可以使用了。

这里也有一篇博客文章来寻找灵感：http://giorasimchoni.com/2017/12/19/2017-12-19-e-is-for-elephant-the-ebayr-package/

Answer 2

url <- 'http://svcs.ebay.com/services/search/FindingService/v1?OPERATION-NAME=findItemsByKeywords&SERVICE-VERSION=1.0.0&SECURITY-APPNAME=USER_ADD_ID&GLOBAL-ID=EBAY-US&keywords=macbook+refurbished&paginationInput.entriesPerPage=10'

getURL(url)

> getURL(url)
[1] "<?xml version='1.0' encoding='UTF-8'?><findItemsByKeywordsResponse xmlns=\"http://www.ebay.com/marketplace/search/v1/services\"><ack>Success</ack><version>1.13.0</version><timestamp>2016-12-05T18:48:43.170Z</timestamp><searchResult count=\"10\"><item><itemId>152233530373</itemId><title>Apple Macbook Air 11.6\" 1.3 GHz Core i5 128 GB SSD, 4GB RAM, Yosemite- MD711LL/A</title><globalId>EBAY-US</globalId><subtitle>OS Upgraded to 10.10 Yosemite l Cosmetic Condition 8/10</subtitle><primaryCategory><categoryId>111422</categoryId><categoryName>Apple Laptops</categoryName></primaryCategory><galleryURL>http://thumbs2.ebaystatic.com/m/mpUZSSnEfwJ5YOFJ8JzcmXw/140.jpg</galleryURL><viewItemURL>http://www.ebay.com/itm/Apple-Macbook-Air-11-6-1-3-GHz-Core-i5-128-GB-SSD-4GB-RAM-Yosemite-MD711LL-A-/152233530373</viewItemURL><productId type=\"ReferenceID\">160128184</productId><paymentMethod>PayPal</paymentMethod><autoPay>true</autoPay><location>USA</location><country>US</country><shippingInfo><shipp... <truncated>

参考Getting Started with the Finding API: Finding Items by Keywords