reading an attachment from soap rsponse

[chrisgh1]

I'm having some trouble reading an attachment from the soap response using.
var file = ws.getAttachment(ctx, "response", "//*[local-name(.)='File1']"); //fs.writeFileSync("result.pdf", file);

after much hacking around I was able to get the file from the soap response by adding
fs.writeFileSync("result.pdf", parts[1].data);

to mtom.js after this block of code
` //use slice() since in http multipart response the first chars are #13#10 which the parser does not expect
var parts = reader.parse_multipart(ctx.response.slice(2), boundary)

if (parts.length==0) {
console.log("warning: no mime parts in response")
callback(ctx)
return
}`

two things that I'm not sure of are:

1. in ws.getAttachment(ctx, "response", "//[local-name(.)='File1']"); what this is doing //[local-name(.)='File1'].
2. what this block of code in mtom.js is trying to do
   for (var i in parts) { var p = parts[i] , id = utils.extractContentId(p.headers["content-id"] ) , xpath = "//*[@href='cid:" + encodeURIComponent(id) + "']//parent::*" , elem = select(doc, xpath)[0] console.log(elem); if (!elem) continue elem.removeChild(elem.firstChild) utils.setElementValue(doc, elem, p.data.toString("base64")) }

fyi the console.log(elem) is returning undefined for each part[0] and part[1] when I run it.

the error I'm getting when I try to run is:
c:\node\test\node_modules\ws.js\lib\ws.js:69
return new Buffer(elem.firstChild.data, "base64")
^

TypeError: Cannot read property 'firstChild' of undefined
at Object.getAttachment (c:\node\test\node_modules\ws.js\lib\ws.js:69:25)

[chrisgh1]

ok a little more information. so in ws.js in function getAttachment() I console logged the var prop.

function getAttachment(ctx, property, xpath) { var prop = eval("ctx." + property); console.log(prop); var doc = new Dom().parseFromString(prop) , elem = select(doc, xpath)[0] return new Buffer(elem.firstChild.data, "base64") }

I'm getting xml from the soap:Envelope. I would thing this is supposed to be the data of the attachment or what was found in parts[1] above.

[chrisgh1]

Ok it seems like elem is not being set to anything from select(doc, xpath)[0] in this code in mtom.js
`var parts = reader.parse_multipart(ctx.response.slice(2), boundary)

if (parts.length==0) {
console.log("warning: no mime parts in response")
callback(ctx)
return
}

var doc = new Dom().parseFromString(parts[0].data.toString())

for (var i in parts) {
var p = parts[i]
, id = utils.extractContentId(p.headers["content-id"] )
, xpath = "//[@href='cid:" + encodeURIComponent(id) + "']//parent::"
, elem = select(doc, xpath)[0]
if (!elem) continue
elem.removeChild(elem.firstChild)
utils.setElementValue(doc, elem, p.data.toString("base64"))
}`

[chrisgh1]

So I added this block of code
if(parts.length > 1){ ctx.file = parts[1].data; }

after

` for (var i in parts) {
var p = parts[i]
, id = utils.extractContentId(p.headers["content-id"] )
, xpath = "//[@href='cid:" + encodeURIComponent(id) + "']//parent::"
, elem = select(doc, xpath)[0]

if (!elem) continue
elem.removeChild(elem.firstChild)
utils.setElementValue(doc, elem, p.data.toString("base64"))

}`

in mtom.js

This seems to work for a single file. I would really like to get the getAttachment working but I don't really understand the third argument in the function. in the example it's set to "//*[local-name(.)='File1']"

[chrisgh1]

Ok so I think I've got this figured out. My clue was in the following issue
#11 look at yaronn comment on Mar 26, 2015

I had to also use the work around
encodeURIComponent = function(s) {return s}

Then I was able to use the following
ws.getAttachment(ctx, "response", "//*[local-name(.)='content']")

which the local-name(.)='content' part was because my soap response from the server was like:
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <ns2:getContentResponse xmlns:ns2="http://url-redacted.com/"> <return> <content_data> <content> <xop:Include href="cid:[email protected]" xmlns:xop="http://www.w3.org/2004/08/xop/include"/> </content> </content_data> </return> </ns2:getContentResponse> </soap:Body> </soap:Envelope>

[jbaris]

@chrisgh1 same problem here. When the document name is an url, then the encodeURIComponent breaks the xpath find.
As you said, to make it run, you need to modify mtom.js by replacing:

xpath = "//*[@href='cid:" + encodeURIComponent(id) + "']//parent::*"

with:

xpath = "//*[@href='cid:" + id + "']//parent::*"

Should we create a PR with this? I mean, do anybody have the same issue?

[chrisgh1]

@jbaris I'm not really fluent in xpath so I wasn't sure if this was an appropriate fix. However now that you have been able to verify that it's working for more than just me maybe it's time for a PR.