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adding web sockets (part 1) #15

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bones7242 merged 6 commits from master into master 2017-05-26 10:37:42 +02:00
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3 changed files with 21 additions and 191 deletions
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173
helpers/lbryApi-old.js
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@ -1,173 +0,0 @@
// load dependencies
var path = require('path');
var axios = require('axios');
// helper function to filter an array of claims for only free, public claims
function filterForFreePublicClaims(claimsListArray){
//console.log(">> filterForFreePublicClaims, claimsListArray:", claimsListArray);
if (!claimsListArray) {
return null;
};
var freePublicClaims = claimsListArray.filter(function(claim){
return (((claim.value.stream.metadata.license.indexOf('Public Domain') != -1) || (claim.value.stream.metadata.license.indexOf('Creative Commons') != -1)) &&
(!claim.value.stream.metadata.fee || claim.value.stream.metadata.fee === 0));
});
return freePublicClaims;
}
// helper function to decide if a claim is free and public
function isFreePublicClaim(claim){
console.log(">> isFreePublicClaim, claim:", claim);
if ((claim.value.stream.metadata.license === 'Public Domain' || claim.value.stream.metadata.license === 'Creative Commons') &&
(!claim.value.stream.metadata.fee || claim.value.stream.metadata.fee.amount === 0)) {
return true;
} else {
return false;
}
}
// helper function to order a set of claims
function orderTopClaims(claimsListArray){
console.log(">> orderTopClaims, claimsListArray:");
claimsListArray.sort(function(claimA, claimB){
if (claimA.amount === claimB.amount){
return (claimA.height > claimB.height);
} else {
return (claimA.amount < claimB.amount);
}
})
return claimsListArray;
}
module.exports = {
publishClaim: function(publishObject){
axios.post('http://localhost:5279/lbryapi', publishObject)
.then(function (response) {
// receive resonse from LBRY
// if successfull, (1) delete file (2) send response to the client
console.log(">> 'publish' success...");
console.log(">> 'publish' response.data:", response.data);
console.log(" [x] Done");
// return the claim we got
//res.status(200).send(JSON.stringify({msg: "you succsessfully published!", txData: response.data}));
}).catch(function(error){
// receive response from LBRY
// if not successfull, (1) delete file and (2) send response to the client
console.log(">> 'publish' error.response.data:", error.response.data);
console.log(" [x] Done");
//res.status(500).send(JSON.stringify({msg: "your file was not published", err: error.response.data.error.message}));
})
},
serveClaimBasedOnNameOnly: function(claimName, res){
// make a call to the daemon to get the claims list
axios.post('http://localhost:5279/lbryapi', {
method: "claim_list",
params: {
name: claimName
}
}
).then(function (response) {
console.log(">> Claim_list success");
console.log(">> Number of claims:", response.data.result.claims.length)
// return early if no claims were found
if (response.data.result.claims.length === 0){
res.status(200).sendFile(path.join(__dirname, '../public', 'noClaims.html'));
return;
}
// filter the claims to return free, public claims
var freePublicClaims = filterForFreePublicClaims(response.data.result.claims);
// return early if no free, public claims were found
if (!freePublicClaims || (freePublicClaims.length === 0)){
res.status(200).sendFile(path.join(__dirname, '../public', 'noClaims.html'));
return;
}
// order the claims
var orderedPublcClaims = orderTopClaims(freePublicClaims);
// create the uri for the first (selected) claim
console.log(">> ordered free public claims", orderedPublcClaims);
var freePublicClaimUri = "lbry://" + orderedPublcClaims[0].name + "#" + orderedPublcClaims[0].claim_id;
console.log(">> your free public claim uri:", freePublicClaimUri);
// fetch the image to display
axios.post('http://localhost:5279/lbryapi', {
method: "get",
params: {
uri: freePublicClaimUri
}
}
).then(function (getResponse) {
console.log(">> 'get claim' success...");
console.log(">> response data:", getResponse.data);
console.log(">> dl path =", getResponse.data.result.download_path)
// return the claim we got
res.status(200).sendFile(getResponse.data.result.download_path);
}).catch(function(getError){
console.log(">> /c/ 'get' error:", getError.response.data);
res.status(500).send(JSON.stringify({msg: "An error occurred while fetching the free, public claim by URI.", err: getError.response.data.error.message}));
})
}).catch(function(error){
console.log(">> /c/ error:", error.response.data);
res.status(500).send(JSON.stringify({msg: "An error occurred while getting the claim list.", err: error.response.data.error.message}));
})
},
serveClaimBasedOnUri: function(uri, res){
/*
to do: need to pass the URI through a test (use 'resolve') to see if it is free and public. Right now it is jumping straight to 'get'ing and serving the asset.
*/
console.log(">> your uri:", uri);
// fetch the image to display
axios.post('http://localhost:5279/lbryapi', { // to do: abstract this code to a function that can be shared
method: "get",
params: {
uri: uri
}
}
).then(function (getResponse) {
console.log(">> 'get claim' success...");
console.log(">> response data:", getResponse.data);
console.log(">> dl path =", getResponse.data.result.download_path)
/*
to do: make sure the file has completed downloading before serving back the file
*/
// return the claim we got
res.status(200).sendFile(getResponse.data.result.download_path);
/* delete the file after a certain amount of time? */
}).catch(function(error){
console.log(">> /c/ 'get' error:", error.response.data);
res.status(500).send(JSON.stringify({msg: "an error occurred", err: error.response.data.error.message}));
})
},
serveAllClaims: function(claimName, res){
// make a call to the daemon to get the claims list
axios.post('http://localhost:5279/lbryapi', {
method: "claim_list",
params: {
name: claimName
}
}
).then(function (response) {
console.log(">> Claim_list success");
console.log(">> Number of claims:", response.data.result.claims.length)
// return early if no claims were found
if (response.data.result.claims.length === 0){
res.status(200).sendFile(path.join(__dirname, '../public', 'noClaims.html'));
return;
}
// filter the claims to return free, public claims
var freePublicClaims = filterForFreePublicClaims(response.data.result.claims);
// return early if no free, public claims were found
if (!freePublicClaims || (freePublicClaims.length === 0)){
res.status(200).sendFile(path.join(__dirname, '../public', 'noClaims.html'));
return;
}
console.log(">> Number of free public claims:", freePublicClaims.length);
// order the claims
var orderedPublicClaims = orderTopClaims(freePublicClaims);
// serve the response
res.status(200).send(orderedPublicClaims); //to do: rather than returning json, serve a page of all these claims
}).catch(function(error){
console.log(">> /c/ error:", error.response.data);
// serve the response
res.status(500).send(JSON.stringify({msg: "An error occurred while finding the claim list.", err: error.response.data.error.message}));
})
}
}

18
helpers/lbryApi.js
View file

@ -38,24 +38,29 @@ function orderTopClaims(claimsListArray){
}
function getClaimWithUri(uri, resolve, reject){
console.log(">> making get request to lbry daemon")
axios.post('http://localhost:5279/lbryapi', {
method: "get",
params: { uri: uri }
}
).then(function (getUriResponse) {
console.log(">> 'get claim' success...");
//check to make sure the daemon didn't just time out
if (getUriResponse.data.result.error === "Timeout"){
kauffj commented 2017-05-31 20:38:11 +02:00 (Migrated from github.com)
Review
Copy link

It's a good idea to define strings that have special values as constants.

It's a good idea to define strings that have special values as constants.
reject("get request to lbry daemon timed out");
}
console.log(">> response data:", getUriResponse.data);
console.log(">> dl path =", getUriResponse.data.result.download_path)
// resolve the promise with the download path for the claim we got
/* note: do not resolve until the download is actually complete */
/*
note: put in a check to make sure we do not resolve until the download is actually complete
*/
resolve(getUriResponse.data.result.download_path);
kauffj commented 2017-05-31 20:39:59 +02:00 (Migrated from github.com)
Review
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If you find yourself accessing the same field repeatedly, like getUriResponse.data, it can be good to just dereference it.

Additionally, assuming you're writing ES6 (which is probably a good idea), you can just write:

.then(({data}) => { if (data.result.error === "Timeout") //etc. })

If you find yourself accessing the same field repeatedly, like getUriResponse.data, it can be good to just dereference it. Additionally, assuming you're writing ES6 (which is probably a good idea), you can just write: `.then(({data}) => { if (data.result.error === "Timeout") //etc. })`
}).catch(function(getUriError){
console.log(">> 'get' error:", getUriError.response.data);
// reject the promise with an error message
reject({
msg: "An error occurred while fetching the free, public claim by URI.",
err: getUriError.response.data.error.message
});
reject(getUriError.response.data.error.message);
return;
});
}
@ -142,7 +147,6 @@ module.exports = {
*/
var deferred = new Promise(function (resolve, reject){
console.log(">> your uri:", uri);
// fetch the image to display
getClaimWithUri(uri, resolve, reject);
});
@ -150,7 +154,7 @@ module.exports = {
},
serveAllClaims: function(claimName, res){
serveAllClaims: function(claimName, res){ // note: work in progress
// make a call to the daemon to get the claims list
axios.post('http://localhost:5279/lbryapi', {
method: "claim_list",

15
public/claim.html
View file

@ -7,25 +7,24 @@
<title>Spee.ch Claim</title>
</head>
<body>
<div id="image">
<h1>spee.ch</h1>
<p>spee.ch is a single-serving site that reads and publishes images to and from the <a href="https://lbry.io">LBRY</a> blockchain.</p>
<h3>Status:</h3>
<p id="status">your image is being retrieved</p>
<div id="image"></div>
<p id="status">Your image is being retrieved</p>
</div>
<script src="/socket.io/socket.io.js"></script>
<script>
var socket = io();
console.log(document.URL)
var url = document.URL.substring(document.URL.indexOf('3000/') + 5); // get from the window?
// request the image through the socket
var url = document.URL.substring(document.URL.indexOf('3000/') + 5);
// request the claim through the socket
socket.emit("claim-request", url);
// listen for updates
socket.on("claim-update", function(data){
console.log("data:", data);
document.getElementById("status").innerHTML = data;
})
// receive the image through the socket
// receive the claim through the socket
socket.on("claim-send", function(data){
if (data.image) {
var base64Image = 'data:image/jpeg;base64,' + data.buffer;