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Cloud Computing Course Project

Architecture

graph TD;
    Clinet-->ServerA;
    ServerA-->Clinet;
    MongoAtlas-->ServerB;
    Imagga-->ServerB;
    ServerB-->Imagga;
    ServerB-->MailGun;
    ServerA-->S3;
    ServerA-->RabbitMQ;
    ServerA-->MongoAtlas;
    RabbitMQ-->ServerB;
    S3-->ServerB;

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Sequence Diagram

sequenceDiagram
    loop ServerA: Listenint to Client
        Client->>+ServerA: Request
        ServerA->>+MongoAtlas: Add Data to Database
        MongoAtlas-->>-ServerA: ACK
        ServerA->>+ArvanCloudS3: Upload Image to S3
        ArvanCloudS3-->>-ServerA: ACK
        ServerA->>+AmqpCloud: Send ID
        AmqpCloud-->>-ServerA: ACK
        ServerA-->>-Client: Response
    end
    loop ServerB: Listening to Queue
        AmqpCloud-->>+ServerB: ID
        ServerB-->>+Imagga: Image URL
        Imagga-->>-ServerB: Process Result
        ServerB->>+MongoAtlas: Update Ad Status
        MongoAtlas-->>-ServerB: ACK
        ServerB->>+Mailgun: Send Email
        Mailgun-->>-ServerB: ACK
    end

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Instructions

Installing Packages

Run the following command to install needed packages:

npm i

Adding credential info to project

Create a src/credentials.js with this content:

const credentials = {
    mongodb: {
        url: '...',
    },
    mailgun: {
        domain: '...',
        apiKey: '...',
    },
    imagga: {
        authorization: '...',
    },
    amqp: {
        url: '...',
        queueKey: '...',
    },
    s3: {
        secretKey: '...',
        accessKey: '...',
        endpointUrl: '...',
        region: '...',
        bucketName: '...',
        bucketContentUrlPrefix: '...',
    },
}

module.exports = credentials;

Starting servers

Following command will start server A on port 3001 and server B on port 3002 and clients will be able to sent their request to server A.

node src  # running src/index.js

APIs

Check Server A

localhost:3001/

response Example:

{
    "result": "OK",
    "message": "Server A is UP!"
}

---

Get List of Advertisements

localhost:3001/ad

response Example:

{
    "result": "OK",
    "data": [
        {
            "id": 1,
            "description": "a simple description",
            "email": "test@example.com",
            "state": "PENDING",
            "category": "UNKNOWN",
            "image": "..."
        },
        {
            "id": 2,
            "description": "a great red sport car!",
            "email": "example@example.com",
            "state": "APPROVED",
            "category": "sports car",
            "image": "..."
        },
    ]
}

---

Get a single Advertisements

localhost:3001/ad/:id

response Example:

{
    "result": "OK",
    "data": {
        "id": 2,
        "description": "a great red sport car!",
        "email": "example@example.com",
        "state": "APPROVED",
        "category": "sports car",
        "image": "..."
    }
}

---

Submiting an Advertisement

localhost:3001/ad

Body (Form Data):

Field Name	Type
image	File (.jpg)
email	String
description	String

response Example:

{
    "result": "OK",
    "message": "آگهی شما با شناسه‌ی 3 ثبت گردید.",
    "data": {
        "id": 3,
        "description": "a simple description",
        "email": "test@example.com",
        "state": "PENDING",
        "image": "...",
        "category": "UNKNOWN"
    }
}

---

Removing an Advertisement

localhost:3001/ad/:id

response Example:

{
    "result": "OK",
    "data": {
        "acknowledged": true,
        "deletedCount": 1
    }
}

---

Removing All Advertisement

localhost:3001/ad

response Example:

{
    "result": "OK",
    "data": {
        "acknowledged": true,
        "deletedCount": 20
    }
}